Gretchen withdrew $31.45 from the bank to buy groceries. then she deposited a check for $27.89 in the bank. which expression represents the net change in her account balance as a result of these two transactions? what is the net change in her account balance?

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.

Which of the following expressions is equal to 2x^2+8

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex