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ValentinkaMS [17]
3 years ago
7

220 million drive cars in the US. If 44 million consider buying a hybrid, what percentage of US drivers are considering buying a

hybrid in 2020? What would the standard deviation be?
Mathematics
1 answer:
aev [14]3 years ago
4 0

Answer: 1/5

Step-by-step explanation: First we start off with 44/220. Then we find the GCF which would be 44. Then we divide both sides by this number to get 1/5.

Hope this helped.

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A spinner is evenly divided into 8 equal areas and numbered from 1 through 8. What is the probability of spinning a number less
elena-s [515]

less than 3 is a 1 or 2

probability of 1    or   probability of 2

        1/8               +            1/8

                        2/8

                    =  1/4

Answer: 1/4  = .25

5 0
4 years ago
Write a linear function from the given values: <br><br> f(2)=-2, f(1)=1<br><br><br> f(4)=1, f(8)=4
kap26 [50]

The slope-intercept form:

y=mx+b

m - slope

b - y-intercept

The formula of a slope:

m=\dfrac{y_2-y_1}{x_2-x_1}

We have:

f(2)=-2\to(2,\ -2)\\f(1)=1\to(1,\ 1).

Substitute:

m=\dfrac{1-(-2)}{1-2}=\dfrac{3}{-1}=-3

Therefore we have y=-3x+b.

Substitute the coordinates of the point (1, 1) to the equation:

1=-3(1)+b

1=-3+b      <em>add 3 to both sides</em>

4=b\to b=4

<h3>Answer: y = -3x + 4</h3>

We have:

f(4)=1\to(4,\ 1)\\f(8)=4\to(8,\ 4)

Substitute:

m=\dfrac{4-1}{8-4}=\dfrac{3}{4}

Therefore we have y=\dfrac{3}{4}x+b.

Substitute the coordinates of the point (4, 1) to the equation:

1=\dfrac{3}{4}(4)+b

1=3+b      <em>subtract 3 from both sides</em>

-2=b\to b=-2

<h3>Answer: y=\dfrac{3}{4}x-2</h3>
3 0
4 years ago
John bought 3 pants for 25 dollars each and paid with a 100 dollar bill how much change did he get?
Leona [35]

Answer:

He got $25 in change.

Step-by-step explanation:

Suppose the balance amount is x.

The cost of 3 pants is 3 × 25 = 75

John paid = $ 100

x = 100 – 75

x =  25

4 0
3 years ago
Read 2 more answers
What is the ratio between 6 and 4?
Firdavs [7]

Answer:

3:2

Step-by-step explanation:

You have to divide both sides by the <u>same </u>number

7 0
4 years ago
Read 2 more answers
F(x) = 3x + 2 replace f(x) with y
kirill [66]

Answer:

 -1           x - 2

f    (x) = -----------

                  3

Step-by-step explanation:

Then we have y = 3x + 2.

Next, interchange x and y, obtaining x = 3y + 2

Next, solve this result for y:  3y = x - 2; then divide both sides by 3:

y = (x-2)/3

Last, replace "y" with the inverse function label:

 -1           x - 2

f    (x) = -----------

                  3

5 0
3 years ago
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