The domain of set E = {(4,5), (6,7), (8,9)} is

What is the y intercept of f(x)=(1/2)^x?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

The rectangle shown has a perimeter of 108 cm and the given area. its length is 6 more than five times its width. write and solve a system of equations to find the dimensions of the rectangle.