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VMariaS [17]
3 years ago
9

Solve the equation for y. Type out your steps to solve this problem as you are showing your work:

Mathematics
2 answers:
Nadya [2.5K]3 years ago
8 0

Answer:

-13/2

Step-by-step explanation:

7(y+3)=5y+8

7y+21=5y+8

7y-5y+21=8

2y+21=8

2y=8-21

2y=-13

y=-13/2

posledela3 years ago
4 0

Answer:

y = -6.5

Step-by-step explanation:

simplify: 7y+21=5y+8

put like-terms together and simplify: 2y=-13

(like-terms: 7y-5y=8-21)

divide both sides by 2: y=-6.5

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the function y = 3.75 + 1.5(x - 1) can be used to determine the cost in dollars of x miles. What is the rate of change of the co
LenKa [72]

We are given

y=3.75+1.5(x-1)

where

y is the cost in dollars

x is distance in dollars

now, we can find derivative

y'=\frac{d}{dx}\left(3.75+1.5\left(x-1\right)\right)

=\frac{d}{dx}\left(3.75\right)+\frac{d}{dx}\left(1.5\left(x-1\right)\right)

=0+1.5

so,

y'=0+1.5

So,

the rate of change of the cost in dollars with respect to the number of miles is 1.5.........Answer

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Which of the following best represents the average speed of a fast runner?
Tpy6a [65]
For the answer to the question above, the easiest way to determine is changing every runner's speed into the same unit.

<span>First = 10 m/s </span>

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Answer:

What are you asking here? This is more like a statement.

Step-by-step explanation:

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Step-by-step explanation:

15.5-6=9.5

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