What two number add up to 9 and multiply to 8

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

The polygon tool to draw a rectangle with a length of 5 units and a height of 3 units. one of the sides of the rectangle falls on line ab , and the rectangle has a vertex of a. each segment on the grid represents 1 unit.

Measures of the angle of r, 31 s (x+4) t (3x+9)