The length of the boston marathon is 138,35 ft. each stride, or step, by a particular runner 3 ft long. does the number of strides the runner takes fit evenly into the length of the race?
explain your answer

plasss helll

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

If 3x+8=3x+8 is it one solution or no solution

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) = .