Question

If f(x) = 5x + 40, what is f(x) when x = -5?
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Answer 1

15, step by step: 5(-5)+40= f(x) [ ur plugging in x ] so 5(-5) is -25 now u have -25+40 u do the math or do it on a calculator and u get 15

Answer 2

`15`

Explanation:

f(x) = 5x + 40

If x = -5, that means that f(-5)

So you need to substitute the number -5 for the variable x in the equation.

5x + 40

Substitute:

5(-5) + 40

5 * -5 = -25

-25 + 40

15