### Home > CC4 > Chapter 11 > Lesson 11.2.6 > Problem 11-129

11-129.

If

*f*(*x*) =+ 5 determine each of the following values. Homework Help ✎ a.

*f*(−1)b.

c.

*x*if*f*(*x*) = 10

Substitute −1 for the

variable *x*.

10

One of the answers is *x* = 8. What is the other?