I dont understand how to rewrite 9 (x+12).

Each of the four sides of a swimming pool measures 9 meters. the pool is 5 meters deep. how much water will be needed to fill it completely? a. 45 cubic meters b. 81 cubic meters c. 225 cubic meters d. 405 cubic meters reset next

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

3x + 4y = 5 x- 3y = -7 solve by substitution