How do i rename 3,290 as hundreds and tens

In the 30-60-90 triangle below side s has a length of and side r has a length

The first few steps in solving the quadratic equation 9x2 + 49x = 22 ? 5x by completing the square are shown. 9x2 + 49x = 22 ? 5x 9x2 + 54x = 22 9(x2 + 6x) = 22 which is the best step to do next to solve the equation by completing the square? 9(x2 + 6x + 3) = 25 9(x2 + 6x + 3) = 49 9(x2 + 6x + 9) = 31 9(x2 + 6x + 9) = 103

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10