Plsss I need help. Find the product of -3.5(-1/7)
A. 0.5
B. -0.5
C. 5
D. -0.05 It's worth 20 points

You decide instead to take the train there. the train will take 135 minutes. convert this into hours and minutes.

9/10 divide by -3/15 as a mixed number

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) = .