Which of the following expressions represents a function? a. x^2 + y^2 = 9 b. {(4, 2), (4, −2), (9, 3), (9, −3)} c. x = 4 d. 2x + y = 5

What is the volume of the sphere shown below with a radius of 3?

The spring the owner of a sporting good store decreases the price of winter gloves from $10 to $8 each increases the price of swimming goggles from $8 to $10 without doing the math you think the percent decrease in the price of the gloves the same as the percent increase of the goggles explain why or why not

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.