Which of the following is an arithmetic sequence? a.4, 6, 10, 16, 26 b. 4, 16, 64, 256 c. 5, 12, 17, 29, 46 d. 3, 7, 11, 15, 19

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20

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) = .