Terrance is 3.5 years older than stephanie. stephanie is 22.5 years old. if the equation t – 3.5 = 22.5 models the situation, find the value for t, terrance’s age.

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) = .

What’s -11-33k and factor each expression completely

Use the quadratic function to predict f(x) if x equals 8. f(x) = 25x2 − 28x + 585