Which set of ordered pairs could represent a linear function? A = {(-8,9), (-2,6), (0,5), (4,3)}
B = {(0, -8), (1, -6), (3,-2), (4,1)}
C = {(-6, -7), (-2,-4), (1, -1), (4, 2)}
D = {(2,3), (5, -3), (6,-5), (7,-8)}

Suppose the probability of selling a car today is 0.28. find the odds against selling a car today.

Which expression is equivalent to the expression below? (6c^2 + 3c) / (-4c + 2) / (2c + 1) / (4c - 1)a. 3c(2c-1) / (2c + 1)b. -3c(2c-1)^2 / (2c + 1)^2c. 3cd. -3c(just took the test its d. -3c)

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) = .