6(9+2x) 9(-5 -7g) 4(-7w -6) 6+8(4p+9) 9(-7w -2) -3(9-4r)-7r 9(6-5c) -7(4r+6)-5 -5+3(6-9r) 5-6(-3+7n)

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 value of x. give reasons to justify your solutions! c ∈ ae

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.