14.) -4/5 is the slope Count rise over run and always make sure whether to add a negative based on the direction of the line. In this situation, the line is negative so there is a negative sign present.
An unpainted roof. Assuming the dimensions of the roof are 10 meters by 5 meters by 0.2 meters. To solve for the total surface area of the roof to be painted:
SA = 2 (wl + lh + wh) SA = 2 ( 10*5 + 10*0.2 + 5*0.2) SA = 106 square meters
