Which of the functions below could have created this graph? V
O A. F(x)=-*
B. F(x)= 3x +2x
O C. F(x)= x*+2
+2x-2

O D. F(x)=-**-
4-4

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 = 4x^2 - 19x- 5

Out of 50 students surveyed, 16 have a dog. based on these results, predict how many of the 280 students in the school have a dog.