Solve equation by the addition method

x+3y=15,-8x+3y=-12

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Solve each quadratic equation by factoring and using the zero product property. x^2 + 18x = 9x

An object is translated by (x + 4, y - 2). if one point in the image has the coordinates (5, -3), what would be the coordinates of its pre-image? (9, -5) (1, -5) (9, -1) (1, -1)