The formula for the area of a triangle is , where b is the base of the triangle and h is the height of the triangle. what is the length of the base of a triangle with an area of 30 and a height of 12 ft?

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

If the angle bisectors of a pair of opposite angles of a quadrilateral are the opposite sides of a parallelogram formed by the two angle bisectors and two sides of the quadrilateral, is the quadrilateral always a parallelogram? explain your answer.