The point on the y-axis is D. (0;-2)
It would be Adjacent/hypotenus which is 36/39 and when simplified the answer is 12/13
I think you have to combine like terms to solve this one. (6d - 3d) + (5 - 2) = 3d + 3
It's 448 square feet so you'll require 1 and some. buy 2 gallons
