Amber and Yenni have $46 altogether. Amber and Peter have $54 altogether. Peter and Yenni have $66 altogether. What is the ratio of Yenni's share to the total sum of money?

The sales totals at macy's food store have increased exponentially over the months. which of these best shows the sales in the first three months?

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) = .

Which of the following expressions cannot be simplified to x – 2?