Find the missing side of this right triangle 8 13

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

X+y=-4 x-y=2 use elimination with adding and subtraction

Adesigner charges a one time fee of $200 plus $40 an hour for each project. write an expression to represent how much money the designer will make for a project