ANSWER FOR BRAINLIEST: Kim asked 6 friends how many siblings they had. The responses were: 0, 3, 2, 1, 1, 2, 3.

Find the MEAN ABSOLUTE DEVIATION (MAD) of the responses.

The suare root of 9x plus 7 plus the square rot of 2x equall to 7

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) = .

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?