Question

If f(x) = 5x + 40, what is f(x) when x = -5?

A. -9
B. -8
C. 7
D. -5

(please help)​

Answer 1

Hello!!! Princess Sakura here ^^

Explanation:

So first thing we'll have to plug in what we know...

`-5=5x+40`

Then we should start by subtracting 40 on both sides...

`-45=5x`

Then after that we will simple just have to divide 5 on both sides to get the answer of...

`f(x)=-9`

So it's choice A. -9