The local grocery store sells different sizes of peanut butter. Find the unit prices for each size container, and then identify the best deal. 12 oz: $ per oz

Given right triangle xyz, which correctly describes the locations of the sides in relation to

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) = .

Ntriangle abc, m∠a = 35° and m∠b = 40°, and a=9. which equation should you solve to find b?