Isabel wrote 11 letters to friends each month for x months in a row. write an expression to show the total number of letters Isabel wrote

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.

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28