Answer: what shape?
Step-by-step explanation:
More info please
You pick a card at random. 5 6 7 What is P(odd or greater than 6)?
The answer to the question is 1/3.
There are three possible outcomes: 5, 6, or 7.
Out of these three outcomes, only two satisfy the condition of being odd or greater than 6: 7.
Therefore, the probability of picking a card that is odd or greater than 6 is 1/3, or approximately 0.333 or 33.3%.
To solve more on probability :
https://brainly.com/question/12594357?referrer=searchResults
In a recent survey, 60% of the community favored building a supermarket in their neighborhood. If 25 citizens are chosen, what is the variance of the number favoring the supermarket?
The variance of the number of citizens favoring the supermarket is 6.
To find the variance of the number of citizens favoring the supermarket, we need to use the binomial distribution formula:
Variance = n × p × (1 - p)
where n is the number of trials (25 in this case), p is the probability of success (0.6 in this case), and (1 - p) is the probability of failure.
Plugging in the values, we get:
Variance = 25 × 0.6 × (1 - 0.6)
Variance = 25 × 0.6 × 0.4
Variance = 6
The binomial distribution is a probability distribution that models the number of successes in a fixed number of independent trials, where each trial has only two possible outcomes, success or failure. In this case, the trials are the 25 citizens who were chosen, and the success is the event of favoring the supermarket, which has a probability of 0.6.
To learn more about variance follow the link:
https://brainly.com/question/14116780
#SPJ1
The number of users of the internet in a town increased by a factor of 1.01 every year from 2000 to 2010. The function below shows the number of internet users f(x) after x years from the year 2000: f(x) = 3000(1.01)x Which of the following is a reasonable domain for the function?
Answer:
0 ≤ x ≤ 10
Step-by-step explanation:
The domain is the possible values that the variable can take.
The statement "the number of internet users f(x) after x years from the year 2000" is telling us that the x-axis represents the number of years, so the domain of the function is the number of years from 2000 to 2010.
Number of years = 2010 - 2000 = 10 years
So we know that is at most 10 years; therefore
Since years can't be negative, we can also infer that x must be 0 or bigger than 0, so
Now we can combine both inequalities to find the reasonable domain of the function:
Find the surface area of the pyramid.
A drawing of a square pyramid. The length of the base is 4.5 meters. The height of each triangular face is 6 meters.
The surface area of the pyramid is 74.25 square meters.
What is surface area?Surface area is the total area that the surface of an object occupies. It is the sum of the areas of all the faces, sides, and curved surfaces of an object. Surface area is usually measured in square units, such as square meters, square feet, or square centimeters.
What is pyramid?A pyramid is a polyhedron with a polygonal base and triangular faces that meet at a common vertex (known as the apex). Pyramids are named according to the shape of their base.
In the given question,
The area of the base is simply the area of a square, which is:
Area of base = length x width = 4.5m x 4.5m = 20.25 square meters
To find the area of each triangular face, we first need to find the length of the slant height (the height of the triangle).
We can use the Pythagorean theorem to do this:
h²= (1/2 x base)² + height²
h² = (1/2 x 4.5)² + 6²
h² = 2.25 + 36
h² = 38.25
h = √38.25
h = 6.18 meters (rounded to two decimal places)
Now that we know the slant height, we can find the area of each triangular face:
Area of one triangular face = (1/2 x base x height) = (1/2 x 4.5 x 6) = 13.5 square meters
Since there are four triangular faces on a square pyramid, we need to multiply this by 4 to find the total area of the triangular faces:
Total area of triangular faces = 4 x 13.5 = 54 square meters
Finally, we can find the surface area of the pyramid by adding the area of the base and the area of the triangular faces:
Surface area = Area of base + Total area of triangular faces
Surface area = 20.25 + 54
Surface area = 74.25 square meters
Therefore, the surface area of the pyramid is 74.25 square meters.
To know more about Surface area, visit:
https://brainly.com/question/29298005
#SPJ1
A heptagon has perimeter 88 feet. Four of the sides are the same length, and the remaining sides are half as long. How long are the shorter sides?
the other two angles of the triangle must also be equal, which means that the other two sides of the triangle must be equal as well. the length of the shorter sides is [tex]y = 16 feet[/tex] .
What are the remaining sides are half as long in heptagon?Let's start by using the information given to write equations for the perimeter of the heptagon in terms of the length of the sides:
Let x be the length of the four equal sides, and y be the length of the remaining three sides, which are half as long. Then, we have:
Perimeter [tex]= 4x + 3y[/tex]
We also know that the perimeter is 88 feet, so we can set up the equation:
[tex]4x + 3y = 88[/tex]
Now we need to solve for y, which represents the length of the shorter sides.
We can simplify the equation by substituting y = (1/2)x:
[tex]4x + 3(1/2)x = 88[/tex]
Simplifying this expression, we get:
[tex]7x/2 = 88[/tex]
Multiplying both sides by 2/7, we get:
[tex]x = 32[/tex]
Now that we know x, we can find y by substituting it into the equation y [tex]= (1/2)x[/tex]:
[tex]y = (1/2)(32) = 16[/tex]
Therefore, the length of the shorter sides is [tex]y = 16[/tex] feet.
Learn more about heptagon here:
https://brainly.com/question/12630702
#SPJ9
Twelve friends share 4 cookies equally. What fraction of a cookie does each friend get? Write in simpliest form
Answer:
2/5 of the cookie
Step-by-step explanation:
12 friends need to split 4 cookies
4 cookies needs to divided by 10 people
[tex]\frac{4cookies}{10 people}[/tex] = [tex]\frac{4}{10}[/tex]
simplify: [tex]\frac{4}{10} = \frac{2}{5}[/tex]
100 POINTS + BRAINLIEST
Find a number between 100 and 200 which is also equal to a square number
multiplied by a prime number.
Answer:
Numbers between 100 and 200 which are also equal to a square number multiplied by a prime number are:
108, 112, 116, 117, 124, 125, 128, 147, 148, 153, 162, 164, 171, 172, 175, 176, 180, 188, 192Step-by-step explanation:
A square number is a number that has been multiplied by itself.
For example, 25 is a square number as 5 × 5 = 25.
The square numbers between zero and 200 are:
4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144, 169, 196.A prime number is a whole number greater than 1 that cannot be made by multiplying other whole numbers (its only factors are 1 and itself).
Since the smallest square number is 4, and our final number needs to be between 100 and 200, we only need to list the primes numbers that are less than 50 as 4 × 50 = 200.
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.Begin with the smallest prime number, 2. If we divide 100 and 200 by this prime number, we get 50 and 100. Therefore, to find a number between 100 and 200 that is equal to a square number multiplied by a prime number, the square number should be more than 50 and less than 100. Therefore:
64 × 2 = 12881 × 2 = 162The next smallest prime number is 3. If we divide 100 and 200 by 3 we get 33.33.. and 66.66... Therefore, the prime number 3 should be multiplied by a square number that is more than 33 and less than 67:
36 × 3 = 10849 × 3 = 14764 × 3 = 192The next prime number is 5. If we divide 100 and 200 by 5 we get 20 and 40. Therefore, the prime number 5 should be multiplied by a square number that is more than 20 and less than 40:
25 × 5 = 12536 × 5 = 180Continuing this way, all the numbers that are between 100 and 200, which are also equal to a square number multiplied by a prime number are:
64 × 2 = 12881 × 2 = 16236 × 3 = 10849 × 3 = 14764 × 3 = 19225 × 5 = 12536 × 5 = 18016 × 7 = 11225 × 7 = 17516 × 11 = 1769 × 13 = 1179 × 17 = 1539 × 19 = 1714 × 29 = 1164 × 31 = 1244 × 37 = 1484 × 41 = 1644 × 43 = 1724 × 47 = 188Number between 100 and 200 which is also equal to a square number multiplied by a prime number is 147.
Further Explanation:A prime number is a positive integer greater than 1 that has no positive integer divisors other than 1 and itself. In simpler terms, a prime number is a number that can only be evenly divided by 1 and itself.
To find this number, I first looked for square numbers between 100 and 200. The square numbers within this range are 121 (11 squared) and 169 (13 squared).
I then checked if either of these square numbers could be multiplied by a prime number to equal a number between 100 and 200. After some calculation, I found that 169 cannot be multiplied by a prime number to give a number between 100 and 200. However, 121 can be multiplied by 2 to give 242, which is greater than 200.
Finally, I checked if there were any other square numbers I missed. I found that 7 squared is equal to 49, which when multiplied by 3 (a prime number) gives 147, a number between 100 and 200 that satisfies the problem.
Therefore, the number between 100 and 200 which is also equal to a square number multiplied by a prime number is 147.
I hope this helps!
please help !!!!
Consider the table, equation,
and graph. Which of them represents a proportional relationship?
The graph represents a proportional relationship.
What is proportional relationship?
A proportional relationship is a relationship between two variables where their ratio remains constant. This means that as one variable increases or decreases, the other variable changes proportionally in order to maintain a constant ratio. In other words, the two variables are directly proportional to each other. This relationship can be represented by a straight line passing through the origin on a graph. Proportional relationships are commonly used in various fields such as physics, finance, and engineering to analyze and predict outcomes.
Explaining the table, equation and graph to know which represents a proportional relationship :
The relationship between the values in the given table is not proportional. If it was a proportional relationship, then the ratio of y to x would be constant. However, in this case, the ratios are not equal. For example, the ratio of y to x for the first row is 3.6/3 = 1.2, but the ratio of y to x for the second row is 6/5 = 1.2, and the ratio of y to x for the third row is 7.2/8 = 0.9. Therefore, the ratios are not equal and the relationship is not proportional.
The equation y=2x+5 does not represent a proportional relationship. In a proportional relationship, there is a constant ratio between the two variables. However, in this equation, the ratio between y and x is not constant, but rather it increases as x increases.
The graph represents a proportional relationship as the ratio between y and x is constant.
To know more about proportional relationship visit :
brainly.com/question/29765554
#SPJ1
If L=15 inches,w=4 inches,and H=5 inches,what is the volume of the rectangular prism
Answer:
150 cubic inches.
Step-by-step explanation:
the volume of a prism = cross-section area* length
= 1/2*4*5*15
= 150 cubic inches.
Answer:
The answer is 300 inches
Step-by-step explanation:
15*4*5
What polygon pair is similar
Scale factor of the similar polygon pairs is:
5. 6
6. 5/12
7. 4/15
8. 1/7
Define scale factor?When both the original dimensions and the new dimensions are known, the scale factor may be determined.
The following is a basic formula to determine a figure's scale factor:
Scale factor is equal to the difference between the dimensions of the old and new shapes.
Here in the first figure,
The sides are in a ratio of 1:6. The sides have increased 6 times so the scale factor here is 6.
Similarly in the trapezium, the ratio of the sides is 5/12.
The scale factor here becomes 5/12.
In the next figure, the sides are in a ratio of 4/15. Scale factor for the pair here is 4/15.
In the last figure, the equivalent sides are in the ratio of 1/7. The scale factor between the pair is 1/7.
To know more about scale factor, visit:
https://brainly.com/question/30215119
#SPJ1
The product of 4 and Gail’s age is 72
Use the variable g to represent Gail’s age
Answer: g=18
Step-by-step explanation:
g*4=72
g=72/4
g=18
If μ (∠2) =98°, find the following angle measures.
Answer:
μ (∠1) = 82°
μ (∠2) = 98°
μ (∠3) = 82°
μ (∠4) = 98°
Step-by-step explanation:
As the vertically opposite angles are equal to each other,
μ (∠2) = μ (∠4)
98° = 98°
As the angles in a straight line are added up to 180°,
μ (∠2) + μ (∠3) = 180
98 + μ (∠3) = 180
μ (∠3) = 180 - 98
μ (∠3) = 82°
As the vertically opposite angles are equal to each other,
μ (∠3) = μ (∠1)
82° = 82°
For this linear inequality, describe how to represent the solutions on a graph:
y< 2x+5
O check all solutions to see if they make true statements
O shade to the left of the boundary
shade below the boundary line
O shade above the boundary
Answer / Step-by-step explanation:
To represent the solutions of the linear inequality y < 2x + 5 on a graph, we can follow these steps:
First, we draw the boundary line y = 2x + 5, which is a straight line with a slope of 2 and a y-intercept of 5.
Since the inequality is y < 2x + 5, we need to shade the region that is below the boundary line. This is because any point below the line will have a y-coordinate that is less than 2x + 5, which satisfies the inequality.
We can also use a dashed line to represent the boundary line, since the inequality is strict (y < 2x + 5, not y ≤ 2x + 5).
Finally, we can check the solutions to the inequality by picking any point in the shaded region and plugging its coordinates into the inequality. If the resulting statement is true, then that point is a valid solution to the inequality. If the statement is false, then the point is not a solution.
Therefore, to represent the solutions of the inequality y < 2x + 5 on a graph, we would shade below the dashed line y = 2x + 5.
Please help by showing me how to answer this
Therefore , the solution of the given problem of probability comes out to be there is a 0.44 percent chance of choosing a lady.
What precisely is probability?A procedure's criteria-based systems' main objective is to ascertain the likelihood that an assertion is accurate or that a particular event will take place. Chance can be represented by any number range between 0 and 1, where 0 is commonly used to indicate the possibility of something may be and 1 is usually employed to indicate a degree of confidence. A probability diagram shows the likelihood that a particular occurrence will occur.
Here,
By adding the probabilities of selecting a woman from each squad, weighted by the probabilities of selecting each team,
we can use the law of total probability to determine the likelihood of selecting a woman:
=> Woman = P(Red) * P(Woman from Red) + P(Blue) * P(Woman from Blue) + P(Yellow) * P(Woman from Yellow)
=> P(Woman) = 0.2 + 0.12 + 0.12 P(Woman) = 0.44 P(Woman) = 0.4 * 0.5 + 0.4 * 0.3 + 0.2 * 0.6
As a result, there is a 0.44 percent chance of choosing a lady.
To know more about probability visit:
https://brainly.com/question/11234923
#SPJ1
Question What is the value of the expression? (9 1/2 − 3 7/8)+(4 4/5 − 1 1/2) Enter your answer as a mixed number in simplest form by filling in the boxes. $$
Answer:
To add mixed numbers, we need to add the whole numbers separately and fractions separately.
Starting with the whole numbers, we have:
9 1/2 − 3 7/8 + 4 4/5 − 1 1/2
= (9 + 4) − (3 + 1) + (4/5 − 1/2) + (1/8 − 7/8) (grouping the terms)
= 10 − 4 + (8/10 − 5/10) + (−6/8) (converting fractions to have a common denominator)
= 6 + 3/10 − 3/4 (simplifying fractions and adding whole numbers)
= 5 7/20 (expressing the result as a mixed number in simplest form)
Therefore, the value of the expression is 5 7/20.
69 POINTS NEED HELP ASAP QUESTION IS DOWN BELOW
Answer:
(a) 22 inches
(b) 770 inches
(c) 26,950 inches
Step-by-step explanation:
(a) To find the perimeter of the drawing, we add up the lengths of all four sides:
Perimeter of drawing = 7 + 4 + 7 + 4 = 22 inches
(b) The length and width of the actual garden are 35 times larger than the dimensions in the drawing. This means that the actual length is 7 x 35 = 245 inches and the actual width is 4 x 35 = 140 inches. To find the perimeter of the actual garden, we add up the lengths of all four sides:
Perimeter of actual garden = 245 + 140 + 245 + 140 = 770 inches
(c) When the dimensions of the garden are multiplied by 35, the perimeter of the garden will also be multiplied by 35. This is because each side will increase by a factor of 35, so the total length of all four sides will increase by a factor of 35 as well. Therefore, the new perimeter will be:
New perimeter = 35 x Perimeter of actual garden = 35 x 770 = 26,950 inches
GEOMETRY TWO SIDES GIVEN WHAT IS POSSIBLE FOR THIRD 20 AND 15 ARE GIVEN PLEASE HELP
Using the triangle inequality theorem, the possible values for the third side of the triangle are: 5 < x < 35.
How to Apply the Triangle Inequality Theorem?The Triangle Inequality Theorem asserts that for any triangle, the sum of the lengths of any two sides must be greater than the length of the third side.
Stated differently, the difference between the lengths of any two sides must be less than the length of the third side.
Thus, if you have the lengths of two sides of a triangle, as 20 and 15, we have:
20 - 15 < x < 20 + 15
5 < x < 35
Learn more about triangle inequality theorem on:
https://brainly.com/question/1163433
#SPJ1
Triangle ABC iść right ta C. AB = 13cm, AC = 12cm and X się tej position on AB such that CX is perpendicular to AB. Find the length CX asa fraction or correct to 2 decimal places.
help plsssss… i don’t understand & or know how to do it
Trigonometric ratios are mathematical functions that relate the angles of a right triangle to the lengths of its sides.
Trigonometric ratiosTan 45 = x/13
x = 13 Tan 45
x = 13
Sin 30 = x/4
x = 4 Sin 30
x = 2
Tan 60 = 21/y
y = 21/Tan 60
y = 12.1
Cos 45 = x/22
x = 22Cos 45
= 15.6
Tan 45 = 5/x
x = 5/Tan 45
x = 5
Sin 30 = 9/x
x = 9/Sin 30
9 = 18
Cos 60 = y/22
y = 22Cos 60
y = 11
Sin 45 = x/16
x = 16Sin 45
x = 11.3
Tan 30 = x/42
x = 42 Tan 30
x = 24.2
Learn more about trigonometry:https://brainly.com/question/29002217
#SPJ1
Vehicles passing over a bridge have two options for paying their bridge toll: paying with a live cashier or using a Speed
Pass device affixed to the dashboard. Data on a busy day for cars and trucks passing over the bridge are shown here.
Payment Method
Vehicle Type
Live Cashier
Car
Truck
47
Total
53
114
What percentage of vehicles are trucks, given that they use Speed Pass?
* 28.1%
41.2%
68.3%
72.3%
35
Speed Pass
18
67
Total
102
65
167
The proportion of vehicles that are trucks and use speed passes is 0.7321.
How to get the proportionThe proportion can be gotten by determining the total number of trucks that pay via the live cashier and speed pass. The sum of these trucks is 65. Of these, the total number of truck vehicles that pay through speed passes is 47. This expresses the relationship between the total sum of trucks and the actual number that uses speed passes.
So, to get the proportion of vehicles that are trucks and make their payments using speed passes is 47 divided by 65. The answer is 0.7321. So, option D is right.
List of options:
A. 0.2814
B. 0.4123
C. 0.6826
D. 0.7321
Learn more about proportions here:
https://brainly.com/question/1496357
#SPJ1
what is the successor of -34
The successor of -34 is -33 using the formula "n+1".
What is a successor?A phrase that follows or is right after a specific number, term, or value is known as a successor.
The successor of n is "n+1" if n is a number (and n belongs to any whole number).
The terms just after, immediately after, and next number/next value are also used to describe a successor.
As is common knowledge, integers are collections of numbers that range from negative infinity to positive infinity.
The integers are.........., -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5,.................. The preceding and following numbers will also be negative integers if the provided number is a negative integer.
So, the successor of -34:
= -34 + n
= -34 + 1
= - 33
Therefore, the successor of -34 is -33 using the formula "n+1".
Know more about successor here:
https://brainly.com/question/30407513
#SPJ1
2-3(x+4)=8
-2/3
-6
2/3
6
Answer:
x = -6
Step-by-step explanation:
2-3(x+4) = 8
2 - 3x - 12 = 8
-3x - 10 = 8
-3x = 18
x = -6
Answer:
x = -6
Step-by-step explanation:
2 - 3 (x + 4) = 8
2 - 3x - 12 = 8
- 10 - 3x = 8
- 3x = 8 + 10
- 3x = 18
x = -18/3
x = -6
___________
hope this helps!
The Quick Meals Diner served 335 dinners. A child's plate cost $2.60 and an adult's plate cost $8.30. A total of $1,458.10 was collected. How many of each type of plate was served?
Round answers to the nearest whole person.
----- child plates were served.
----- adult plates were served.
232 child's plates were served and 103 adult's plates were served after rounding to the nearest whole number.
What is substitution method?The substitution method involves solving one equation for one variable in terms of the other variable, and then substituting this expression into the other equation.
According to question:Let's use the following variables:
c = number of child's plates served
a = number of adult's plates served
We can set up a system of two equations based on the given information:
c + a = 335 (the total number of plates served was 335)
2.6c + 8.3a = 1458.1 (the total amount collected was $1458.10)
To solve this system, we can use the substitution method. Rearrange the first equation to solve for one variable in terms of the other:
c = 335 - a
Substitute this expression for c in the second equation and solve for a:
2.6(335 - a) + 8.3a = 1458.1
871 - 2.6a + 8.3a = 1458.1
5.7a = 587.1
a = 103
Now that we know there were 103 adult's plates served, we can substitute this value back into the first equation and solve for c:
c + 103 = 335
c = 232
Therefore, 232 child's plates were served and 103 adult's plates were served.
To know more about substitution method visit:
https://brainly.com/question/30339603
#SPJ1
A hiker climbs a trail that has a 2,150 feet elevation in two stages.
In stage one, he climbs 2% of the total elevation.
In stage two, he climbs at a rate of 12 feet per minute. About how many minutes does it take the hiker to reach the top of the mountain during stage two?
It takes the hiker about 175.58 minutes to climb the remaining elevation of the mountain in stage two.
calculating the elevation the hiker climbs in stage one:
2% of 2,150 feet = 0.02 × 2,150 feet = 43 feet
Therefore, the hiker climbs 43 feet in stage one. To find the time it takes for the hiker to climb the remaining elevation of the mountain in stage two, we need to know the total elevation he needs to climb in this stage. This can be calculated by subtracting the elevation climbed in stage one from the total elevation of the mountain: Total elevation - Elevation climbed in stage one = 2,150 - 43 = 2,107 feet
Now, we can use the rate of climb in stage two to find the time it takes to climb 2,107 feet:
Time = Distance / Rate
Time = 2,107 feet / 12 feet per minute
Time ≈ 175.58 minutes
Therefore, it takes the hiker about 175.58 minutes to climb the remaining elevation of the mountain in stage two.
To learn more about calculating elevation, refer to:
https://brainly.com/question/28120185
Suppose
cos()=3/4
.
Using the formulas
Determine
cos(
Answer:
Step-by-step explanation:
I'm sorry, but there seems to be some information missing from your question. Specifically, it is unclear what quantity or angle you want to determine the cosine of.
If you meant to ask for the value of the cosine of an angle given that its sine is 3/4, then we can use the Pythagorean identity to determine the cosine:
sin^2(x) + cos^2(x) = 1
Plugging in sin(x) = 3/4, we get:
(3/4)^2 + cos^2(x) = 1
Simplifying, we have:
9/16 + cos^2(x) = 1
Subtracting 9/16 from both sides, we get:
cos^2(x) = 7/16
Taking the square root of both sides, we get:
cos(x) = ±sqrt(7)/4
Since the sine is positive (3/4 is in the first quadrant), we know that the cosine must also be positive. Therefore:
cos(x) = sqrt(7)/4
I hope this helps! Let me know if you have any further questions.
Bestimmen Sie die ganzrationale Funktion vom Grad drei, deren Graph punktsymmetrisch zum Ursprung ist, einen Tiefpunkt an der Stelle x - 1 hat und A (2|2) enthält
Answer: Da der Graph punktsymmetrisch zum Ursprung ist, können wir annehmen, dass er die Form f(x) = ax^3 hat.
Step-by-step explanation:
Da der Graph einen Tiefpunkt an der Stelle x = 1 hat, gilt f'(1) = 0 und f''(1) < 0.
Also gilt:
f(x) = ax^3 + bx^2 + cx + d
f'(x) = 3ax^2 + 2bx + c
f''(x) = 6ax + 2b
Da f'(1) = 0, haben wir:
3a + 2b + c = 0
Da f''(1) < 0, haben wir:
6a + 2b < 0
3a + b < 0
b < -3a
Da der Graph punktsymmetrisch zum Ursprung ist, haben wir:
f(-x) = -f(x)
Also haben wir:
-a x^3 + bx^2 - cx + d = -ax^3 - bx^2 - cx - d
oder
2bx^2 + 2d = 0
b = -d
Da der Graph durch A(2|2) geht, haben wir:
8a + 4b + 2c + d = 2
Und da der Graph einen Tiefpunkt bei x = 1 hat, haben wir:
f(1) = a + b + c + d = 0
Jetzt können wir die Gleichungen lösen, um die Koeffizienten der Funktion zu finden. Zunächst setzen wir b = -d ein und erhalten:
3a + 2b + c = 0
6a - 2d < 0
b < -3a
a + b + c + d = 0
8a - 2b + 2c - d = 2
Lösen dieser Gleichungssysteme liefert a = -1
A student added the rational expressions as follows:
Problem:
Work:
5x
+
x+7
5x
+
x+7
Solution:
7
x
7(7)
x+7
5x+49
x+7
Describe and correct the error the student made. Solve the problem correctly.
The correct answer is (5x + 1) / (x+7).
What error did the student make?
The student made an error in adding the rational expressions. They attempted to add the numerators directly without finding a common denominator.
To add rational expressions, we must first find a common denominator, which is the Least Common Multiple (LCM) of the two denominators. Then, we can add the numerators.
Here is the correct solution:
Problem:
(5x) / (x+7) + 1 / (x+7)
First, note that both rational expressions have the same denominator (x+7). In this case, the LCM is simply (x+7). We can now add the numerators:
Work:
(5x) / (x+7) + 1 / (x+7) = (5x + 1) / (x+7)
Solution:
(5x + 1) / (x+7)
The correct answer is (5x + 1) / (x+7).
Read more about rational expressions here:
https://brainly.com/question/25292194
#SPJ1
Help!! It’s due tomorrow!! I need help with all of it
The probability based on the information will be;
a. Likely, probability is 25%
b. Likely, probability is 25%
c. Impossible, probability is 0%
d. Unlikely, probability is 33.3%
How to explain the probabilityThe probability of rolling a 5 on a 6 sided die is 1/6 or approximately 16.67%.
The probability of not rolling a 5 on a 6 sided die is 5/6 or approximately 83.33%. This can also be:
= 100 - 16.67
= 83.33%
The probability of spinning an even number on a spinner with numbers 1-8 is 4/8 or 1/2 or 50%.
The probability that a white horse is George is 1/5 or 20%.
An event that has probability of 0% is something that is impossible, such as rolling a 7 on a 6-sided die. An event that has a probability of 100% is something that is certain, such as flipping a coin and getting either heads or tails.
Learn more about probability on;
https://brainly.com/question/24756209
#SPJ1
Recall the logistic function for
A,B,k>0
constants:
f(t)=
1+Λe
−kt
B
Let us assume that
A>1
. Show that the maximum growth rate of
f(t)
between
t=0
and
t=
k
A
occurs at
t=
k
ln(Λ)
Hint: while it is not necessary, the logarithmic differentiation trick from last homework can speed things up significantly.
After answering the presented question, we can conclude that function Therefore, the maximum growth rate of [tex]f(t)[/tex] occurs at [tex]t = k ln(Λ)[/tex] .
What is function?In mathematics, a function appears to be a link between two sets of numbers, in which each member of the first set (known as the domain) corresponds to a specific member of the second set (called the range).
A formula or a graph can be used to represent a function. For example, the formula [tex]y = 2x + 1[/tex] depicts a functional form in which each value of x generates a unique value of y.
To find the maximum growth rate of [tex]f(t)[/tex] between t=0 and t=kA, we need to find the maximum value of its derivative with respect to t. Let's start by taking the derivative of f(t) using the chain rule:
[tex]f'(t) = -kΛe^(-kt) / B(1 + Λe^(-kt))^2[/tex]
Now we need to find the value of t that maximizes f'(t). One way to do this is to use logarithmic differentiation. First, take the natural logarithm of both sides of the equation for f'(t):
Next, take the derivative of both sides with respect to t:
[tex]f''(t)/f'(t) = -k + Λke^(-kt) / (1 + Λe^(-kt))[/tex]
Simplifying this expression by multiplying both numerator and denominator by [tex]e^(kt)[/tex], we get:
[tex]f''(t)/f'(t) = -k + Λk / (e^(kt) + Λ)[/tex]
Now we can set f''(t)/f'(t) equal to zero to find the critical points:
[tex]-k + Λk / (e^(kt) + Λ) = 0[/tex]
Multiplying both sides by [tex]e^(kt)[/tex] + Λ and rearranging, we get:
[tex]e^(kt) = Λ/k[/tex]
Taking the natural logarithm of both sides, we get:
[tex]kt = ln(Λ) - ln(k)[/tex]
Solving for t, we get:
[tex]t = ln(Λ)/k - ln(k)/k[/tex]
[tex]t = (ln(Λ) - ln(k))/k[/tex]
[tex]t = ln(Λ/k)/k[/tex]
Substituting this value of t back into f'(t), we get:
[tex]f'(ln(Λ/k)/k) = -kΛe^(-ln(Λ)) / B(1 + Λe^(-ln(Λ)))^2[/tex]
Since A>1, we know that Λ>1. Therefore, e^(-ln(Λ)) = 1/Λ, and we can simplify the expression for f'(ln(Λ/k)/k) to:
[tex]f'(ln(Λ/k)/k) = -k/ΛB(1 + 1/Λ)^2[/tex]
We can now see that f'(ln(Λ/k)/k) is negative, which means that f(t) is decreasing at that point. Therefore, the maximum growth rate of f(t) must occur at either t=0 or t=kA. We can find which one of these is the maximum by comparing the values of f'(0) and f'(kA).
[tex]f'(0) = -kΛ/B(1 + Λ)^2[/tex]
[tex]f'(kA) = -kΛe^(-kA) / B(1 + Λe^(-kA))^2[/tex]
We know that A>1, which means that kA>k. Therefore, [tex]e^(-kA) < e^(-k),[/tex] which means that f'(kA) is greater in magnitude than f'(0). Since f'(kA) is negative, this means that f(t) is decreasing faster at t=kA than at [tex]t=0.[/tex]
Therefore, the maximum growth rate of [tex]f(t)[/tex]occurs at [tex]t=ln(Λ)/k[/tex] , as given by the formula we derived earlier.
Learn more about function here:
brainly.com/question/28193995
#SPJ1
Solve the right triangle (tan,sin,cos)
The value of the trigonometric functions for the right triangle is tan(29) = 0.518. cos(29) = 0.838. sin (29) = 0.435.
What are basic trigonometric functions?The sine, cosine, and tangent trigonometric ratios are the three most important ones. These are their definitions:
Sine (sin) is the proportion of a right triangle's hypotenuse to the length of the side that faces an angle.
The length of the side next to an angle in a right triangle divided by the length of the hypotenuse is known as the cosine (cos).
In a right triangle, the tangent (tan) is the ratio between the lengths of the sides that face each other and the angle.
These ratios are used in trigonometry to connect the angles and sides of right triangles, and they may be used to a number of triangle- and other geometric shape-related problems.
In the given triangle using the sum of interior angle of triangle we have:
180 - 90 - 29 = 61
The measure of the third angle is 61 degrees.
Now, tan(61) = XZ/XY
XZ = XY * tan(61)
XZ = 18 * 1.927 = 34.686
Now, using the Pythagoras theorem we have:
ZY² = XZ² + XY²
ZY² = 34.686² + 18²
ZY² = 1712.3996
ZY = 41.38
Now, the value of:
sin(29) = opposite/hypotenuse = XY/ZY = 18/41.388 = 0.435
cos(29) = adjacent/hypotenuse = XZ/ZY = 34.686/41.388 = 0.838
tan(29) = opposite/adjacent = XY/XZ = 18/34.686 = 0.518
Learn more about trigonometric functions here:
https://brainly.com/question/14746686
#SPJ1