The formula for a trapezoid relates the area a, the two bases, a and b, and the height, h. solve for a.

How many solutions does the nonlinear system of equations graphed below have?

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.