Carol took a math test and answered 16 of the 20 questions correctly. What was Carol's percentage score on the test.
Answer:
80%
Step-by-step explanation:
Calculation for what was Carol's percentage score on the test
Using this formula
Percentage score on the test=Answered questions/Numbers of questions *100
Let plug in the formula
Percentage score on the test=16/20*100
Percentage score on the test=0.80*100
Percentage score on the test=80%
Therefore Carol's percentage score on the test will be 80%
-. The 7th grade enrollment went from 400 to 300 students last year. What was the percent of
decrease?
=========================================
Work Shown:
A = old value = 400
B = new value = 300
C = percent change
C = [(B-A)/A]*100%
C = [(300-400)/400]*100%
C = (-100/400)*100%
C = (-0.25)*100%
C = -25%
The negative value of C means we have a percent decrease. Specifically we have a 25% decrease.
---------
We can see that by saying:
25% of 400 = 0.25*400 = 100
400 - (25% of 400) = 400 - 100 = 300
Solve the system of linear equations by graphing.
y=-4x+3
4x-2y=6
Answer:
x=1, y= -1
Step-by-step explanation:
Please Answer
I need this answer by tomorrow please
Answer:
I'd say x=4.5
Step-by-step explanation:
I learned this in 6th grade so don't completely take my word for it. But you can build off of my answer probably. Sorry.
What slope would make the lines perpendicular? y = 4x + 2 y = -x + 2 Enter the number that belongs in the green box.
Answer:
The missing number in the green box is 4
Step-by-step explanation:
The product of the slopes of the perpendicular lines is -1, which means
if the slope of one of them is m, then the slope of the perpendicular line to it is the negative reciprocal ([tex]\frac{-1}{m}[/tex])The slope-intercept form of the linear equation is y = m x + b, where
m is the slope of the lineb is the y-interceptLet us solve the question
∵ The equation of the first line is y = 4x + 2
→ Compare it with the form of the linear equation above
∴ m = 4
∵ m is the slope
∴ The slope of the line is 4
∵ The slope of the perpendicular line should be the negative reciprocal of it
∵ The negative reciprocal of 4 is [tex]-\frac{1}{4}[/tex]
∴ The slope of the perpendicular line is [tex]-\frac{1}{4}[/tex]
→ Substitute it in the equation
∴ y = [tex]-\frac{1}{4}[/tex] x + 2
∴ The missing number in the green box is 4
2/5 of number n is 18, find the value of n
Answer:
n= 45
Step-by-step explanation:
2/5×n=18
2n/5=18
2n/2=90/2
n=45
A bicycle store costs $ 4050 per month to operate. The store pays an average of $55 per bike. The average selling price of each bicycle is $145. How many bicycles must the store sell each month to break even
Answer:
45
Step-by-step explanation:
Help QUICK PLEASE!!! GIVING BRAINLIEST AND 30 POINTS!!!! Which property can be used to expand the expression -2(3/4x+7)?
Answer:
distributive property
Step-by-step explanation:
your expression will look like this:
-1.5x+(-14)
or -2*3/4x+-2*7
18, 27, 36, 45, 54 Answer: __________ A. Arithmetic sequence B. Geometric sequence C. Neither
Answer:
Arithmetic sequence
Step-by-step explanation:
Arithmetic sequences have a common difference d=n2-n1 whilst Geometric sequences have a common ratio r=r2/r1
Clearly, 27-18=9,6-27=9,54-45=9
since there's a common difference,it's an arithmetic sequence
Kate where are you????
Answer:
What ????????????????
If x and y are two complementary angles,then find the value of y if measure of angle x is 20 degree
Answer:
y = 70°
Step-by-step explanation:
Complementary angles sum to 90°, then
x + y = 90°, that is
20° + y = 90° ( subtract 20° from both sides )
y = 70°
Can you help me out with 3 and 4 pls
Answer:
3) False
4) c (-2, -1, 0, 1, 2)
Step-by-step explanation:
The domain is the set of all possible inputs for a function, which is basically the x-values.
You mix 1/ 3cup of blue paint for every 2/ 3cup of yellow paint to make green paint. You use 4 cups of yellow paint. How much blue paint do you use?
Answer:
You will use 2 cups of blue paint for 4 cups of yellow paint.
Step-by-step explanation:
Given that:
There is 1/3 cup of blue paint for every 2/3 cup of yellow paint
We will find unit rate in terms of yellow paint.
2/3 cups of yellow paint = 1/3 cup of blue paint
Multiplying both sides by 3/2
[tex]\frac{2}{3}*\frac{3}{2}=\frac{1}{3}*\frac{3}{2}\\1\ cup\ of\ yellow\ paint = \frac{1}{2}\ cup\ of\ blue\ paint[/tex]
Now,
4 cups of yellow paint = [tex]4*\frac{1}{2}[/tex] cups of blue paint
4 cups of yellow paint = 2 cups of blue paint
Hence,
You will use 2 cups of blue paint for 4 cups of yellow paint.
the sum of third and seventh terms of an AP is 20 . Find the sum of the first nine
Given:
The sum of third and seventh terms of an AP is 20.
To find:
The sum of the first nine terms.
Solution:
We have, the sum of third and seventh terms of an AP is 20.
[tex]a_3+a_7=20[/tex] ...(i)
nth term of an AP is
[tex]a_n=a+(n-1)d[/tex]
where, a is first term and d is common difference.
[tex]a_3=a+(3-1)d[/tex]
[tex]a_3=a+2d[/tex] ...(ii)
[tex]a_7=a+(7-1)d[/tex]
[tex]a_7=a+6d[/tex] ...(iii)
Using (i), (ii) and (iii), we get
[tex](a+2d)+(a+6d)=20[/tex]
[tex]2a+8d=20[/tex] ...(iv)
Now, the sum of first n terms of an AP is
[tex]S_n=\dfrac{n}{2}[2a+(n-1)d][/tex]
Put n=9 to find the sum of first 9 terms of an AP.
[tex]S_n=\dfrac{9}{2}[2a+(9-1)d][/tex]
[tex]S_n=\dfrac{9}{2}[2a+8d][/tex]
[tex]S_n=\dfrac{9}{2}[20][/tex] [Using (iv)]
[tex]S_n=\dfrac{180}{2}[/tex]
[tex]S_n=90[/tex]
Therefore, the sum of the first 9 terms is 90.
last week apples were on sale for 1.60 a pound. how much wound 4 1/2 pounds of apple cost
A. 4.50
B. 6.10
C. 7.02
D. 7.20
Answer:
Your answer would be D.
Step-by-step explanation:
D, because if we times the cost of one pound of apple by the number of pounds we have then getting the product we will have $7.20
Sheryl has a Christmas lighting project. She is going
to put lights around the outside of 15 windows with
a height of 4ft and a width of 2ft. She also wants to
put lights around her 3 garage doors that are 9 feet
tall and 9 feet wide. How many feet of christmas
lights would be needed for this project?
And 288ft says it’s incorrect
Answer:
If hanging Christmas lights around the garage door is on your holiday to do list, make sure to do it right. Decorating shouldn't be a once-a-year activity that does permanent damage to your home or your body.
When it comes to hanging holiday lights around your garage door, use clips and hooks specifically designed for the task. Avoid using metal fasteners like staples or nails if you are attaching lights directly to the trim; the metal can damage the wiring and create a fire or electrocution hazard. Instead, clip the plastic fasteners to the light string and attach the plastic fasteners to your trim. This way the clips can remain throughout the year, and lights are more easy to hang in the holidays to come.
For the vertical runs, find the trim clips that wrap around the light string and hold it into place (this is particularly important for our Sioux City and Yankton breezes and blizzards). Aim for a clip every 12 inches or so. Some homeowners choose to nail the clips for stability; others use a removable adhesive.
If you are continuing to light up your house with lights around your roof and gutter lines, there are other items that can help make this process easier. Roof and gutter clips can be pressed directly onto the home's exterior; they typically have a hook at the bottom that grabs the light string. Please be very careful when working on high and precarious locations!
Answer:261
Step-by-step explanation:i don’t rlly know how to explain
Trapezoid ABCD was dilated to create trapezoid A’B’C’D’. Which statements are true about the trapezoids? Select three options
The 3 options--1, 2, and 4.
Answer:A, B, E
Step-by-step explanation:
edgenunity
what is 16% of £4.25
Answer:
£o.68 is 16% of £4.25
Step-by-step explanation:
the 16 percent of 4.25
= 16percent ×4.25
= 16/100 ×4.25
=68/100
=£o.68
so,16 percent of 4.25 is £o.68
Someone help ill mark brainless
Answer:
b) 18
Step-by-step explanation:
Plug in 25 for x in the equation.
ie: y=.9(25)-4.5
Then solve using a calculator.
The answer should be 18
ASAP!!!! What is the answer?
Answer:
A, B, C
Step-by-step explanation:
Since the sum of the angles in a triangle is [tex]180^{\circ}[/tex], you can set the equation [tex]9x-7+7x-9+28-2x[/tex]. Simplifying gets [tex]14x=168[/tex]. Dividing gets you [tex]x = 12[/tex]. This is only x so you have to substitute 12 for x in the angles in the beginning to get [tex]\angle{A}=101^{\circ}[/tex], [tex]\\\angle{B}=75^{\circ}[/tex], [tex]\\\angle{C}=4^{\circ}[/tex]
You bought a used truck for $15,000. The value of the truck will
decrease each year because of depreciation. The truck depreciates at the rate of 8% per year. Write an exponential decay model to represent the real-life problem.
Answer:
[tex]15000 \times {0.92}^{x} = y[/tex]
x is the number of years and y is the value at x years
The exponential decay model to represent the real-life problem should be considered as the [tex]15000 \times 0.92^{x} = y[/tex].
Calculation of the exponential decay model:Since the purchase value of the truck is $15,000
The depreciation rate is 8%
So here exponential decay model should be like
[tex]15000 \times 0.92^{x} = y[/tex]
Hence, The exponential decay model to represent the real-life problem should be considered as the [tex]15000 \times 0.92^{x} = y[/tex].
Learn more about model here: https://brainly.com/question/24280482
write the factors of the following expression x3 (2a‐6)+x2 (2a-6)
Given:
The expression is
[tex]x^3(2x-6)+x^2(2x-6)[/tex]
To find:
The factors of the given expression.
Solution:
We have,
[tex]x^3(2x-6)+x^2(2x-6)[/tex]
First taking [tex](2x-6)[/tex] common, the given expression can be written as
[tex]=(2x-6)(x^3+x^2)[/tex]
Taking [tex]x^2[/tex] common from [tex](x^3+x^2)[/tex], we get
[tex]=x^2(2x-6)(x+1)[/tex]
Therefore, the factors of the given expression are [tex]x^2(2x-6)(x+1)[/tex].
PLEASEEE HELPP SOMEONE WITH PART C ONLY WITH EXPLANATION THANK YOU!!!
Answer:
Step-by-step explanation:
given: 6 yds / sec
find the time to ride 12 miles, so how many yards is 12 miles?
12 miles * 1760 yards / 1 mile = 21120 yds
d =r*t d=distance , r= rate , t = time
we know the distance and the rate .. so we can find the time
d/r = t
21120/6 = t ( in seconds)
3520 = t sec.
3520 sec * 1 min / 60 seconds ( to convert to minutes )
3520/60=t ( in minutes)
58 & 2/3 minutes
A recipe for a loaf of bread calls for 2/3of a cup of flour. If Milo used 12 cups of flour, how many loaves of bread did he prepare?
Answer: 18 loaves of bread.
Step-by-step explanation:
Do 12 divided by 2/3 which is the same thing as multiplying 12 by the reciprocal (just flip the fraction) of 2/3 which is 3/2. 12x3/2 is 36/2 which is equal to 18.
A cube has a volume 7^3 of cubic centimeters. What is its surface area?
Answer:
294 cm^2
Step-by-step explanation:
length of the cube is 7cm each side
S.A = 2(7 * 7) + 2( 7 * 7) + 2( 7 * 7)
= 294 cm^2
I need to solve the equation 13b=b+27
Answer:
Solution in photo
Step-by-step explanation:
Answer:
-27
Step-by-step explanation:
a rocking horse has a weight limit of 60 pounds what percentage is 95% of the weight
Answer:
57 lbs is your answer
what is 8 thousandths less than 4.989?
Can two angles be both complementary and vertical? If so, can you determine the angles? Explain how you know.
Answer:
Complementary angles are those that sum up to 90o.Vertical angles have equal measures. Therefore, if vertical angles measure 45o each, they are complementary.
Explanation: Here how it might look if angles ∠1 and ∠3 are measured at 45o.
Which equation in standard form has a graph that passes through the point (3,-9) and has a slope of 5/3?
Answer:
5
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
because I did it and good night and sleep