Answer:
a. 73°
b. 98°
Step-by-step explanation:
In quadrilateral EFGH
∡E+∡G=180° sum of opposite angle of quadrilateral inside the circle is 180°
substituting value
11x+8+8x+1=180°
19x+9=180°
19x=180=9
19x=171
x=171/19
x=9°
similarly,
∡H+∡F=180° sum of opposite angle of quadrilateral inside the circle is 180°
substituting value
6y-4+5y-3=180°
11y-7=180°
11y=180°+7
11y=187°
y=187/11
y=17°
Now
a. m∡G=8x+1=8*9+1=73°
b. m∡H=6y-4=6*17-4=98°
Do the ratios 1/3 and 28/36 form a proportion?
No, the given two fractions/ratios do not form a proportion.
Two ratios are said to be forming proportions if and only if the reduced forms of fractions of the two ratios are the same or are equal to each other. For example - [tex]\frac{3}{6}[/tex] and [tex]\frac{1}{2}[/tex] are in proportion because [tex]\frac{3}{6}[/tex] when reduced to the simplest form gives [tex]\frac{1}{2}[/tex] which is the same as the other given ratio.
In the given question, one ratio given is [tex]\frac{1}{3}[/tex] and the other one is [tex]\frac{28}{36}[/tex]. Reducing the second ratio to the simplest form we get [tex]\frac{7}{9}[/tex]. Clearly, the two fractions are not equal. Hence, the given two ratios are not in proportion.
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What is the meaning of "Once we give up the full Comprehension Schema, Russell’s Paradox is no longer a threat"?
The statement "Once we give up the full Comprehension Schema, Russell's Paradox is no longer a threat" implies that by leaving out the unrestricted version of the Schema of Comprehension (which gives room for the construction of sets based on any property), one can be able to avoid meeting up Russell's Paradox.
What is the meaning of the phrase?
Russell discovered the contradiction that arises when analyzing the collection of sets that lack themselves as components. A contradiction arises due to the paradoxical situation of attempting to ascertain if the set includes itself or not.
By adopting the Subset Schema, which limits the creation of sets based on certain criteria, we can steer clear of the paradox and depart from the comprehensive Comprehension Schema.
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50 Points! Multiple choice algebra question. Photo attached. Thank you!
Answer:
0.15 flowers/ ft²
Step-by-step explanation:
area = 12 X 18 = 216.
population density = population/area
= 32/216
= 0.148
= 0.15 flowers/ ft²
Answer:
A. 0.15 flowers/ft²
Step-by-step explanation:
The population density of flowers is the number of flowers per square foot.
To find the population density, we need to know the area of the garden and the number of flowers.
The area of the garden is 12 feet*18 feet =216 square feet.
The number of flowers is 32.
The population density is 32flowers/216square feet = 0.15 flowers/ft².
Therefore, the answer is (A).
What is the meaning of "If Y = ran(f), then f is a function onto Y"?
The statement implies that the function f has a surjective property, ensuring full coverage of the target set Y.
The statement "If Y = ran(f), then f is a function onto Y" can be understood in the context of mathematical functions and their range.
In mathematics, a function is considered "onto" or "surjective" if every element in the target set (in this case, Y) has a pre-image in the domain set. In other words, for every element y in Y, there exists at least one element x in the domain set such that f(x) = y.
The given statement is saying that if Y is equal to the range of the function f, then f is a function that covers or maps onto every element in Y. In this case, the function f has a mapping for each element in the set Y, ensuring that no element in Y is left without a pre-image in the domain set.
Thus, the statement implies that the function f has a surjective property, ensuring full coverage of the target set Y.
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What is the meaning of "formulas with free variables"?
Formulas with free variables are said to be expressions in formal logic that is known to have variables that are not bound by quantifiers.
What is the meaning of "formulas with free variables"?Variables are placeholders with changeable values in logic. A free variable in a formula has no quantifier and can take any value.
Formula meaning varies with variable values. Formulas containing variables that are not assigned specific values are frequently employed to convey open statements or propositions that require further specification.
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In practice, we shall use in formulas other symbols, namely defined pred- icates, operations, and constants, and even use formulas informally; but it will be tacitly understood that each such formula can be written in a form that only involves and as nonlogical symbols.
Concerning formulas with free variables, we adopt the notational conven- tion that all free variables of a formula
(u1,..., Un)
are among u1, ..., un (possibly some u are not free, or even do not occur, in ). A formula without free variables is called a sentence.What is the meaning of "formulas with free variables"?
Need help asap
A party rental company has chairs and tables for rent. The total cost to rent 8 chairs and 4 tables is $37. The total cost to rent 3 chairs and 2 tables is $17.
What is the cost to rent each chair and each table?
Cost to rent each chair: SI
Cost to rent each table:
Solving a system of equations we can see that the costs are:
For a chair, 3/2 dollars.
For a table, 25/4 dollars.
What is the cost to rent each chair and each table?Here we can define the variables:
x = cost of rending a chair.
y = cost of renting a table.
Here we can write a system of equations:
8x + 4y = 37
3x + 2y = 17
We can subtract two times the second equation from the first one:
8x + 4y - 2*(3x + 2y) = 37 - 2*17
2x = 3
x = 3/2
And the value of y is:
3*(3/2) + 2*y = 17
2y = 17 - 9/2 = 25/2
y = 25/2/2
y = 25/4
These are the costs in dolllars.
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What is absolute value and how do you find the absolute value of a number?
Find the absolute value of the following numbers:
|17| |−25| |−1.23| |0.45|
Identify whether each of the following is rational or irrational: 234 5–√
Convert the decimal 0.44444… to a fraction.
Match the number on the left with its classification on the right. Number Classification 0.3333… nonrepeating decimal 3.48372… repeating decimal 3.3 terminating decimal
Absolute value is a mathematical function that gives the distance of a number from zero on the number line.
How to explain the informationLet's find the absolute value of the given numbers:
|17| = 17
|−25| = 25
|−1.23| = 1.23
|0.45| = 0.45
Now, let's identify whether the following numbers are rational or irrational:
234: This is a rational number because it can be expressed as a fraction (e.g., 234/1).
5–√: This is an irrational number because it cannot be expressed as a fraction or a ratio of integers. The square root of 5 is not a perfect square, so it is irrational.
To convert the decimal 0.44444... to a fraction, we can set it as the variable x and solve the equation:
x = 0.44444...
Multiply both sides by 10 to move the decimal point:
10x = 4.44444...
10x - x = 4.44444... - 0.44444...
9x = 4
Divide both sides by 9:
x = 4/9
Therefore, the decimal 0.44444... is equivalent to the fraction 4/9.
Matching the numbers with their classifications:
0.3333...: This is a repeating decimal.
3.48372...: This is a nonrepeating decimal.
3.3: This is a terminating decimal.
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Rank the circles from largest area to the smallest area Circle a has the diameter of 8 cm circle b has a radiusof 5 cm circle C has an area of 20 pi centimeters
Original price of a chair $150 Discount : 15% what is the selling price
Answer: $127.50
Step-by-step explanation: if we pull up our handy dandy calculator and do 15% of 150 it will output 22.50, 150 - 22 = 127.50 which brings the total to $127.50
Question 3 of 10
The slope of the line below is 4. Which of the following is the point-slope form
of the line?
(-3,-4)
A. y+4= -4(x+3)
B. y-4 = -4(x-3)
C. y+ 4 = 4(x+3)
D. y-4 = 4(x-3)
Answer:
C. y + 4 = 4(x+3)
Step-by-step explanation:
Point slope form: y-y1 = m(x-x1)
Substitute the given slope 4 and point (-3, -4)
y-(-4) = 4(x - (-3))
Simplify
y + 4 = 4 (x+3)
I'm going to buy a condo for $80,000 the bank requires a 10% down payment the rest is financed with a 15-year fixed rate mortgage at 3.5% annual interest with monthly payments find my required down payment find the amount of the mortgage find the monthly payment
The monthly payment on the 15-year fixed rate mortgage is $515.27.
The bank requires a 10% down payment on the condo price of $80,000.
Down Payment = 10% of $80,000
Down Payment = 0.1 * $80,000
Down Payment = $8,000
Therefore, the required down payment is $8,000.
Amount of the Mortgage:
To find the amount of the mortgage, we subtract the down payment from the condo price.
Amount of Mortgage = Condo Price - Down Payment
Amount of Mortgage = $80,000 - $8,000
Amount of Mortgage = $72,000
Therefore, the amount of the mortgage is $72,000.
Now, Monthly Payment = (Loan Amount x Monthly Interest Rate) / (1 - (1 + Monthly Interest Rate) ^ (-Number of Months))
Monthly Interest Rate = Annual Interest Rate / 12
= 3.5% / 12 = 0.035 / 12
= 0.002917
and, Number of Months = 15 years x 12 months = 180 months
So, Monthly Payment = ($72,000 x 0.002917) / (1 - (1 + 0.002917) ^ (-180))
Monthly Payment ≈ $515.27
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Evaluate.
mk
m + k
for m= 6 and k = 2
Options are
.6
.2
.3
.1.5
The value of the given expression:
⇒ mk = 12
⇒ m + k = 8
The given values,
m = 6
k = 2
We have evaluate the given expression,
mk
This is nothing but product of m and k
Since we know,
The product is the result of multiplying two or more numbers together. Assume they are two integers and, then their product is derived by multiplying both numbers together.
Therefore,
⇒ mk = 6x2
⇒ mk = 12
We have evaluate the given expression,
m + k
This is nothing but addition of m and k
Since we know that,
Addition is the process of joining two or more integers. The numbers being added are known as addends, and the result or final response obtained after the procedure is known as the total.
⇒ m + k = 6 + 2
⇒ m + k = 8
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Use the Law of Sines to find the length of side b in AABC. Round to the nearest tenth. Show your work.
Consider ▲ ABC.
B
28°
112°
37
The length of side b in triangle ABC is 18.7 units.
What is the law of sines?In Mathematics and Geometry, the law of sines is also referred to as sine law or sine rule and it can be defined as an equation that relates the side lengths of a triangle to the sines of its angles.
In Mathematics and Geometry, the law of sine is modeled or represented by this mathematical equation (ratio):
[tex]\frac{sinA}{a} =\frac{sinB}{b} =\frac{sinC}{c}[/tex]
In this context, the value of b can be determined as follows;
sin112/37 = sin28/b
b = 37sin28/sin112
b = 17.3705/0.9272
b = 18.7 units.
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50 Points! Multiple choice geometry question. Photo attached. Thank you!
The law of sines indicates that, where the angle of elevation of the Sun is 73°, the length of the shadow of the tree is 20 ft, and the inclination of the tree is 5°, the length of the tree is 51.1 ft. The correct option is therefore;
(C) 51.1 ft.
What is the law of sines?The law of sines states that the ratio of the length of a side in a triangle to the sine of the angle facing that side is equivalent for the three sides of a triangle.
The length of the shadow = 20 feet
Angle of elevation to the Sun = 73°
The angles formed by the triangle formed by the tree are;
73°, (90 - 5) = 85°, (180 - 85 - 73) = 22°
Let l represent the length of the tree. The law of sines indicates that we get;
20/(sin(22)) = l/sin(73)
Therefore; l = sin(73°) × (20/(sin(22°))) ≈ 51.1 feet
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WILL GIVE BRAINLIEST FOR CORRECT ANSWER!!
The first figure is dilated to form the second figure.
Which statement is true?
(A) The scale factor is 0.8.
(B) The scale factor is 1.25.
(C) The scale factor is 2.0.
(D) The scale factor is 18.0.
Can you help me find x
[tex] \boxed{\rm{Similarity \: shape}}[/tex]
[tex]\begin{aligned} \frac{AB}{DE}&= \frac{BC}{EF}\\ \frac{36}{24}&=\frac{15}{x} \\ x &= \frac{\cancel{^{ \green{2}}24} \times 15}{\cancel{36_{ \green{3}}}} \\ x&= \frac{2 \times 15}{3} \\ x &= \bold{10} \\ \\\small{\blue{\mathfrak{That's \: it \: :)}}} \end{aligned}[/tex]
50 Points! Multiple choice geometry question. Photo attached. Thank you!
Area of a polygon formula: = 2(1+[tex]\sqrt{2}[/tex]) side²
To find one side: 96 ÷ 8 = 12
implement formula
≈695.29351
Teresa thought the theoretical possibility of getting a head when flipping a coin was 1/2 when she flipped a coin 150 times she got 95 heads is this what she would have expected
Teresa's result of 95 heads is slightly higher than what she would have expected, it is still reasonably close to the expected value based on the theoretical probability of getting a head when flipping a fair coin.
Teresa's result of 95 heads in 150 coin flips is slightly higher than what she would have expected if the theoretical possibility of getting a head when flipping a coin was exactly 1/2.
When flipping a fair coin, the probability of getting a head is indeed 1/2, and the probability of getting a tail is also 1/2. Therefore, if we assume that the coin is fair and unbiased, we can use the concept of expected value to determine what Teresa would have expected.
The expected value of a single coin flip can be calculated as follows:
Expected value = (Probability of an outcome) * (Value of the outcome)
In this case, the probability of getting a head is 1/2, and the value of getting a head is 1 (since we are interested in the number of heads). Therefore, the expected value of a single coin flip is:
Expected value = (1/2) * 1 = 1/2
To determine what Teresa would have expected in 150 coin flips, we can multiply the expected value of a single coin flip by the number of flips:
Expected number of heads = (Expected value) * (Number of coin flips)
Expected number of heads = (1/2) * 150 = 75
So, if Teresa had flipped the coin 150 times and the coin was fair, she would have expected to get approximately 75 heads.
However, Teresa obtained 95 heads in her actual experiment. This result is slightly higher than the expected value of 75 heads. It's important to note that, due to the inherent randomness of coin flips, there will always be some variation between the expected and actual results. Flipping a coin 150 times is a relatively small sample size, and it is within the realm of possibility to deviate from the expected outcome.
Therefore, while Teresa's result of 95 heads is slightly higher than what she would have expected, it is still reasonably close to the expected value based on the theoretical probability of getting a head when flipping a fair coin.
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Triangle LMIN with vertices L(2, -8), M(12, 8),
and N(14,-4): * = ½
The vertices of triangle image are L'(1, -4), M'(6, 4) and N'(7, -2).
Given that, triangle LMIN with vertices L(2, -8), M(12, 8) and N(14,-4).
Here, scale factor k=1/2
Now, by applying scale factor to the vertices, we get
L(2, -8)→1/2 (2, -8)→L'(1, -4)
M(12, 8)→1/2 (12, 8)→M'(6, 4)
N(14,-4)→1/2 (14, -4)→N'(7, -2)
Therefore, the vertices of triangle image are L'(1, -4), M'(6, 4) and N'(7, -2).
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"Your question is incomplete, probably the complete question/missing part is:"
Triangle LMIN with vertices L(2, -8), M(12, 8), and N(14,-4): k = ½.
Fraction 1: the quantity x plus 1 over the quantity x squared minus 25; Fraction 2: the quantity x plus 5 over the quantity x squared plus 8 times x plus 7; Find Fraction 1 times by Fraction 2.
The product of the fractions is 1/[(x - 5)(x + 7)]
How to evaluate the product of the fractionsFrom the question, we have the following parameters that can be used in our computation:
Fraction 1 = (x + 1)/(x² - 25)
Also, we have
Fraction 2 = (x + 5)/(x² + 8x + 7)
So, we have
Product = (x + 1)/(x² - 25) * (x + 5)/(x² + 8x + 7)
When factored, we have
Product = (x + 1)/(x - 5)(x + 5) * (x + 5)/(x + 1)(x + 7)
Evaluate the products
Product = 1/(x - 5) * 1/(x + 7)
This gives
Product = 1/[(x - 5)(x + 7)]
Hence, the product of the fractions is 1/[(x - 5)(x + 7)]
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Eleanor used a ruler to report the length of a
piece of wood as 9.7 inches.
Part A:
What is the range of values in inches for the
actual measurement of the piece of wood?
Part B :
How many significant digits does the measurement have?
Answer:
Part A: The actual measurement of the piece of wood could be between 9.65 and 9.75 inches.
Part B: The measurement has three significant digits.
Step-by-step explanation:
Significant digits are the digits in a number that carry meaning in terms of the precision or accuracy of the measurement. In this case, the number 9.7 has three significant digits, which means that the measurement is accurate to the tenths place.
50 Points! Multiple choice geometry question. Photo attached. Thank you!
The length of PQ in circle R is given as follows:
C) 3.14 m.
What is the measure of the circumference of a circle?The circumference of a circle of radius r is given by the equation presented as follows:
C = 2πr.
The radius for the circle in this problem is given as follows:
r = 3 m.
Hence the circumference for the entire circle is given as follows:
C = 2 x 3.14 x 3
C = 18.84 m.
The sector has an angle measure of 60º, while the entire circumference is of 360º. hence the measure of arc PQ is given as follows:
PQ = 60/360 x 18.84
PQ = 3.14 m.
Hence option C is the correct option in the context of this problem.
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What is the meaning of "we shall use in formulas other symbols, namely defined predicates, operations, and constants, and even use formulas informally"?
The statement indicates that in practical applications, it is common to extend the basic logical language with additional symbols and allow for some degree of informality in the representation of formulas, as long as it is clear that these additional symbols and formulas can be formalized in terms of the basic logical language.
What does the statement mean?The statement means that when working with formulas in a particular context or domain, it is common to introduce additional symbols beyond the basic logical symbols such as "E" (for existential quantification) and "∧" (for conjunction). These additional symbols can include defined predicates, operations, and constants.
Defined predicates refer to predicates or relations that are defined in terms of other predicates or relations. They can be used to express complex concepts or conditions in a concise manner. For example, in mathematics, one may define a predicate "Prime(x)" to represent the concept of a number being prime.
Operations refer to functions or operations that can be applied to terms or formulas. They allow for combining or manipulating expressions in a meaningful way. For instance, addition, multiplication, and exponentiation are common operations in mathematics.
Constants are symbols that represent specific, fixed values. They can be used to denote specific objects or elements within the domain of discourse. For example, in logic, "0" and "1" can be used as constants to represent the truth values "false" and "true," respectively.
Furthermore, the statement suggests that formulas may be used informally, meaning that they can be expressed or written in a less strict or precise manner. While the informal representation of formulas may be easier to understand or work with, it is understood that each of these formulas can be translated or reformulated in a way that only involves the basic logical symbols (such as "E" and "∧") and the specified nonlogical symbols (such as defined predicates, operations, and constants).
Overall, the statement acknowledges that in practical applications, it is common to extend the basic logical language with additional symbols and allow for some degree of informality in the representation of formulas, as long as it is clear that these additional symbols and formulas can be formalized in terms of the basic logical language.
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Which three lengths CAN be the lengths of the sides of a triangle? A. 12cm, 5cm, 17cm, B. 10cm, 15cm, 24cm C. 9cm, 22cm, 11cm D. 21cm, 7cm, 6cmWhich three lengths CAN be the lengths of the sides of a triangle? A. 12cm, 5cm, 17cm, B. 10cm, 15cm, 24cm C. 9cm, 22cm, 11cm D. 21cm, 7cm, 6cmWhich three lengths CAN be the lengths of the sides of a triangle? A. 12cm, 5cm, 17cm, B. 10cm, 15cm, 24cm C. 9cm, 22cm, 11cm D. 21cm, 7cm, 6cmWhich three lengths CAN be the lengths of the sides of a triangle? A. 12cm, 5cm, 17cm, B. 10cm, 15cm, 24cm C. 9cm, 22cm, 11cm D. 21cm, 7cm, 6cmWhich three lengths CAN be the lengths of the sides of a triangle? A. 12cm, 5cm, 17cm, B. 10cm, 15cm, 24cm C. 9cm, 22cm, 11cm D. 21cm, 7cm, 6cmWhich three lengths CAN be the lengths of the sides of a triangle? A. 12cm, 5cm, 17cm, B. 10cm, 15cm, 24cm C. 9cm, 22cm, 11cm D. 21cm, 7cm, 6cm
Based on the Triangle Inequality Theorem the possible lengths of the sides of a triangle are:
B. 10cm, 15cm, 24cmD. 21cm, 7cm, 6cmWhat are the possible lengths of the sides of a triangle?The Triangle Inequality Theorem which states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side, is used to determine if three lengths can be the lengths of the sides of a triangle.
Considering each option:
A. 12cm, 5cm, 17cm:
12 + 5 > 17 (not satisfied)
5 + 17 > 12 (satisfied)
12 + 17 > 5 (satisfied)
B. 10cm, 15cm, 24cm:
10 + 15 > 24 (satisfied)
15 + 24 > 10 (satisfied)
10 + 24 > 15 (satisfied)
C. 9cm, 22cm, 11cm:
9 + 22 > 11 (satisfied)
22 + 11 > 9 (satisfied)
9 + 11 > 22 (not satisfied)
D. 21cm, 7cm, 6cm:
21 + 7 > 6 (satisfied)
7 + 6 > 21 (not satisfied)
21 + 6 > 7 (satisfied)
Hence, option B and D are correct.
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50 Points! Multiple choice geometry question. Photo attached. Thank you!
Answer:
The Law of Sines can be used to solve triangles when you have two angles and a side (AAS or ASA) or two sides and a non-included angle (SSA). In this case, triangle A can be solved using the Law of Sines because it has two angles and a side (AAS).
50 Points! Multiple choice geometry question. Photo attached. Thank you!
Can someone please help me with this??
The solution to the given simultaneous equations using Cramer's rule is x = -1, y = -4.92, z = -1.03.
How to Solve Simultaneous Equation Using Crammer's RuleTo solve the given simultaneous equations using Cramer's rule, we need to find the determinants of various matrices.
Given the set of equation:
3x-3y+ 5z = 5
9x - 8y + 13z = 14
-3x+4y- 7z=-7
We start by finding the determinant of the coefficient matrix, which is denoted as D.
D = [tex]\left[\begin{array}{ccc}3&-3&5\\9&-8&13\\-3&4&-7\end{array}\right][/tex]
To calculate D, we use the formula:
D = (3 * (-8) * (-7) + (-3) * 13 * (-3) + 5 * 9 * 4) - ((-3) * (-8) * 5 + 3 * 13 * 4 + (-3) * 9 * (-7))
D = (-168 + 117 + 180) - (120 - 156 + 189)
D = 129 - 165
D = -36
Next, we need to find the determinants of the matrices obtained by replacing the columns of the coefficient matrix with the constant terms. These determinants are denoted as Dx, Dy, and Dz, respectively.
Dx = [tex]\left[\begin{array}{ccc}5&-3&5\\14&-8&13\\-7&4&-7\end{array}\right][/tex]
Dx = (-40 - 65 + 20) - (-70 - 60 + 189) = -85 - (-121) = -85 + 121
Dx= 36
Dy = [tex]\left[\begin{array}{ccc}3&5&5\\9&14&13\\-3&-7&-7\end{array}\right][/tex]
Dy = (21 + 75 + 35) - (-21 - 130 + 105) = 131 - (-46) = 131 + 46
Dy = 177
Dz = [tex]\left[\begin{array}{ccc}3&-3&5\\9&-8&14\\-3&4&-7\end{array}\right][/tex]
Dz = (39 - 39 + 0) - (-27 + 84 + 20) = 0 - (-37) = 0 + 37
Dz = 37
Finally, we can find the values of x, y, and z using the formulas:
x = Dx / D
y = Dy / D
z = Dz / D
Plugging in the values, we have:
x = 36 / -36 = -1
y = 177 / -36 ≈ -4.92
z = 37 / -36 ≈ -1.03
Therefore, the solution to the given simultaneous equations using Cramer's rule is x = -1, y ≈ -4.92, z ≈ -1.03.
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Choose the kind(s) of symmetry in the 2D number. (Select all that apply.)
plane
point
line
none
Answer:
plane
point
line
Step-by-step explanation:
Based on the options provided, the kinds of symmetry in a 2D number can be:
Plane symmetry: This refers to a symmetry where a figure can be divided into two identical parts by a plane. This symmetry is also known as reflectional symmetry.Point symmetry: This refers to a symmetry where a figure can be rotated 180 degrees around a central point to produce the same figure. This symmetry is also known as rotational symmetry.Line symmetry: This refers to a symmetry where a figure can be divided into two identical parts by a straight line. This symmetry is also known as bilateral symmetry.Therefore, the possible kinds of symmetry in a 2D number can be
plane symmetry,
point symmetry, or
line symmetry.
PLEASE HELP ME ANSWER QUESTIONS 7, 8, 9 AND 10. I REALLY, REALLY NEED THEM
The area under the curve y = x² + 5x + 4 and the x-axis is [tex]1\frac{2}{3}[/tex] square units.
To find the area under the curve y = x² + 5x + 4 and the x-axis, we need to integrate the given function over a specific interval.
We need to find the definite integral of the function over a suitable interval.
Let's find the definite integral of the function from its roots (where the curve intersects the x-axis).
First, let's find the roots of the function by setting y = 0:
x² + 5x + 4 = 0
Factoring the quadratic equation:
(x + 1)(x + 4) = 0
Setting each factor equal to zero:
x + 1 = 0 => x = -1
x + 4 = 0 => x = -4
The roots of the function are x = -1 and x = -4.
To find the area under the curve, we integrate the function from x = -4 to x = -1:
∫[x=-4 to -1] (x² + 5x + 4) dx
Integrating the function:
∫[x=-4 to -1] (x² + 5x + 4) dx = [1/3x³ + (5/2)x² + 4x] from -4 to -1
Substituting the limits:
[1/3(-1)³ + (5/2)(-1)² + 4(-1)] - [1/3(-4)³ + (5/2)(-4)² + 4(-4)]
Simplifying:
[-1/3 + 5/2 - 4] - [-64/3 + 40/2 - 16]
[tex]1\frac{2}{3}[/tex]
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There is a substance called sodium-24 that decays at a rate of 4.5% per hour, compounded continuously.
You start with a sample of 500 grams of this substance.
a) Write a function to model the amount remaining after t hours.
The function to model the amount remaining after t hours is:
[tex]A(t) = 500 \times e^{-0.045t}[/tex]
We have,
To model the amount remaining after t hours for the substance sodium-24, which decays at a rate of 4.5% per hour compounded continuously, we can use the formula for continuous exponential decay:
[tex]A(t) = A(0) \times e^{-rt}[/tex]
Where:
A(t) is the amount remaining after t hours,
A(0) is the initial amount,
e is the base of the natural logarithm (approximately 2.71828),
r is the decay rate (expressed as a decimal).
In this case,
The initial amount A(0) is 500 grams, and the decay rate r is 4.5% per hour, which can be expressed as 0.045 (decimal form).
Thus,
The function to model the amount remaining after t hours is:
[tex]A(t) = 500 \times e^{-0.045t}[/tex]
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