### Home > CCAA8 > Chapter 7 Unit 8 > Lesson CCA: 7.2.2 > Problem 7-99

7-99.

If , find the value of the expressions in parts (a) through (c) below. Then complete parts (d) through (f).

Substitute

for and simplify.

Refer to part (a).

Refer to part (a).

What value of

gives?Substitute

for and solve for.Where does the graph of this function cross the

-axis? The-axis?A function crosses the

-axis at, and a function crosses the-axis at.If

, find.

Use the eTool below to find the value of each expression in parts (a) through (c).

Click on the link at right for the full eTool version: *7-99 HW eTool*