Which sum or difference is modeled by the algebra
a. (x2 - 2x + 3) - (-x2 - 4x - 2) = 2x-1
b. (x2 - 2x - 3) + (x2 - 4x + 2) = 2x - 1
c. (x2 - 2x - 3) - (x2 + 4x + 2) = 2x-1
d. (x2 - 2x - 3) + (-12 + 4x + 2) = 2x-1

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.

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

Suppose that g(x)=f(x+9) which statement best compares the graph of g(x) with the graph of f(x)