Match equivalent expressions. (a)(x+9)(x+2)
(b)(x-2)(x-3)
(c)(x+2)(x+3)
(d)(x-2)(x+3)
(e)(x-9)(x+2)
(x-9)(x-2)
(1)x²+x-6
(2)x++11x+18
(3)x2-7x-18
(4)x2–5x+6
(5)x2-11x+18
(6)x2 +5x+6

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.

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Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling