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What is the discount price and the final price.
A surfboard, originally purchased for $400, was sold on eBay at a discount of
40% of the original price. What is the discount price and the final price of the
surfboard.
Discount Price:
Final Price:

Suppose that the price p, in dollars, and the number of sales, x, of a certain item follow the equation 4 p plus 4 x plus 2 pxequals56. suppose also that p and x are both functions of time, measured in days. find the rate at which x is changing when xequals2, pequals6, and startfraction dp over dt endfraction equals1.5.