Question

A function follows the rule y = -75 - 5x. When the function's output is 25, the equation is 25 = -75 - 5x.

What is the function input when the output is 25?

10
-10
-20
20

Answer 1

The answer will be -20


Step by step explanation:

Add 75 to both sides.
25+75=-5x

2 simplify 25+75 to 100.
100= -5x 100= -5x

3 divide both sides by -5
5/100
=x


4 simply
5/100
To 20.
-20=x

5 switch sides.
X= -20.