To serve 1 person at a local restaurant, it takes 10 minutes. to serve 5 people, it takes 18 minutes. write and solve an equation to find the number of minutes it will take to serve a pary of 8.

Which of the following are accepted without proof in a logical system? check all that apply.

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) = .

Someone me what is the area of this figure? 18m 18m 8m 16m