Which of the following equations has a graph that crosses the y-axis at a point lower than y=2x^2-1
a. y=-3x^2+1
b. y=3x^2-3
c. y=-3^2-1
d. y=-3^2+3

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

The diagram shows corresponding lengths in two similar figures. find the area of the smaller figure. a. 14.4 yd2 b. 24 yd2 c. 26.4 yd2 d. 28