What are the vertices of the resulting image A’B’C’D’E’ after rotating the figure 90° about the origin?

What are the soultion(s) to the quadratic equation 40- x^2=0

In a two-digit number the units' digit is 7 more than the tens' digit. the number with digits reversed is three times as large as the sum of the original number and the two digits. find the number.

For a function f(x), a) if f(7) = 22 then f^-1(22) = b) f^-1(f(c)) =