What expression is equivalent to x2 - 49? OA (x - 72
O B. (x + 7)2
OC. (x+7)(x-7)
D. (x+7)(7 - x)

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Can someone me do math because i am having a breakdown rn because i don’t get it

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) = .