Select the correct answer. Which equation has infinitely many solutions?

A. -6.8 + 3y + 2.4 = 4.3 - 3y

B. 1/3y + 2.5 - 2/3y = 1.2

C. 5.1 + 2y + 1.2 = -2 + 2y + 8.3

D. 2/5y = 2.3 + 3/2y

An animal shelter has 21 puppies. if the puppies are 28% of the total dog and cat population , how many dogs and cats are in the animal shelter

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) = .

What is the slope of the line shown below?