The points ABC have coordinates (3,5)(7,8)(6,1) respectively. show by calculation that AB is perpendicular to AC. also find the equation for AC in the Form ax+by+c=0 where a, b, c are integers whose value must be stated. also the point D is on AC produced and AC:CD =1:2, find the coordinates of D.​

-9

step-by-step explanation:

the given 6 = w/p is equivalent to 6p = w, where w is the total area of the walls and p is the area covered by a single can of paint.

knowing that 6 cans of paint will be needed, 6p = w becomes 6(6) = w = 36.   this tells us that the total area to be painted is 36 square units.