You plan to buy x books for $4 each. The function f(x) = 4x represents the total cost of the books. You have a coupon for 10% off of the total price of the books. Let the function g(x) represent the cost of the books after the coupon. Write g(x) as a transformation of the function f(x), then simplify the equation.

Writing the simplest form of a fraction means the numerator and the denominator have no common factors other than 1.a. trueb. false

Acourt reporter is transcribing an accident report from germany. the report states that the driver was traveling 80 kilometers per hour. how many miles per hour was the driver traveling?

Prove (a) cosh2(x) − sinh2(x) = 1 and (b) 1 − tanh 2(x) = sech 2(x). solution (a) cosh2(x) − sinh2(x) = ex + e−x 2 2 − 2 = e2x + 2 + e−2x 4 − = 4 = . (b) we start with the identity proved in part (a): cosh2(x) − sinh2(x) = 1. if we divide both sides by cosh2(x), we get 1 − sinh2(x) cosh2(x) = 1 or 1 − tanh 2(x) = .