Solve for x. Round your answer to the nearest tenth

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.

What does x = in this equation x+3+2x=x+5

Explain how you can find the missing fraction in 3 4/5 / (blank) 2 5/7. then find the missing fraction.