PL HELP ME ASAP. Abe, a plumber, charges $50 per hour plus $75 for making an in–home visit. The equation 75 + 50h = c represents this cost c for working h number of hours. If he made $475, how many hours did he work?

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) = .

Who long does it take to drive 150 miles at 45 miles per hour

Susie wants to take her friend out for lunch.she wants to spend $9.75 each person. how much will she spend in all.