A number is decreased by seven. Then, the new number is multiplied by 3 to get an answer of -9. What is the original number?
A: -30
B: -4
C: 4
D: 30

(No shown work is needed)

The diagonals of a quadrilaretral intersect at (-1,4). one of the sides of the quadrilateral is bounded by (2,7) and (-3,5) determine the coordinates of the other side in order for the quadrilaretral to be a square.

Gh bisects fgi. find the measure of hgi •15° •21° •10° •8°

Which of the following describes the symmetry of the graph of y = x3?