What are the subsets of real numbers which 13 belongs?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

If x = -2, then x 2-7x+10 equals a. 0 b.20 c.28

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