Prove whether the following are identities 2tanh 1/2x / 1−tanh^2 1/2 x = sinh x​

Afrequency table of grades has five classes (a, b, c, d, f) with frequencies of 3, 13, 14, 5, and 3 respectively. using percentages, what are the relative frequencies of the five classes?

Write an expression that represent sarah’s total pay last week. represent her hourly wage with w monday 5 tuesday 3 wednesday 0 noah hours wednesday 8 only with w wage did noah and sarah earn the same amount last week?

Which two undefined geometric terms always describe figures with no beginning or end?