The expression 20L+25G -10 calculates the number of dollars That the ABC lawn company makes from mowing lawns and raking gardens how many dollars does the company Mike from raking guard 444 gardens in mowing 333 lawns?

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?

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) = .