C and D are mutually exclusive events. Find P(C or D). P(C)=3/11,P(D)=8/11 (round to three decimal places as needed.).​

Find the value of the variable and the length of each secant segment.

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) = .

Simplify 24÷(-2)(3)+7 a. -29 b. 3 c. 11