What is the slope of the line represented by the equation y = -1/2x + 1/4

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

What values of x satisfy the inequality x^2-9x< 0? how is your answer shown on the graph?

To solve the system of equations below, grace isolated the variable y in the first equation and then substituted into the second equation. what was the resulting equation? 3y=12x x^2/4+y^2/9=1