Question

Using the equation y = 2x + 5, what would the input need to be for an output of -15? A : -25 B : -35 C : -10 D : -5

Answer 1

the answer is -25

Explanation:

y = 2x + 5

y = 2x(-15) + 5

2 times -15 = -30

-30 + 5 = -25

Hope this helps! :)

Answer 2

Answer: C: -10

Explanation:

An output is another word for y. If we set y to -15, we can solve for x, or the input variable.

`-15=2x+5`

Subtract 5 from both sides of the equation.

`-20=2x\\`

Divide both sides of the equation by 2.

`-10=x`

Therefore, x = -10.

Hope this helps!