Find the unit rate. Round to the nearest hundredth, if necessary. $1.99 for 18 lb
what is the unit rate?

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) = .

Rewrite the following quadratic functions in intercept or factored form. show your work. y = x^2 + 7x + 10

What’s the range cuz i can’t find it?