Solve for u
10 − u = u − 10

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 the arc length of the semicircle. 7the grade

Simplify each expression. use positive exponents. show work . (x –2 y –4 x 3 ) –2