1. Use the following graph to find for what values of x is f(x)=0, f(x) > 0, and f(x) <0. 2. Given a graph, explain how you would know if it represented an invertible function.

7.3

step-by-step explanation:

use distributive property on all like terms and change your signs if you have a double negative or if you have positive/negative

thus, the first answer choice, y = sec x, is the correct one

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.