What is the simplified form of this expression? (9x+10+4)-(9x+5-1)

Acircle has a diameter will endpoints of (-2,8) and (6, 4). what is the center of the circle

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10