3x + 28 5x + 52
2x - 10
Find the value of x and find the value of angle B and angle C.
X =
Angle B
Angle C =

You earn a 12% commission for every car you sell. how much is your commission if you sell a $23,000 car?

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) = .

The roots of the function f(x) = x2 – 2x – 3 are shown. what is the missing number?