Find the surface area of a cube by squaring the length of one side and multiplying the result by 6.
Example: The surface area of a cube with side length 3 is "6 x (3 x 3) = 54".
y = kx for a proportional relationship
12 = k*5
divide each side by 5
12/5 = k
y = 12/5 x
if x=8
y = 12/5 * 8
y = 96/5
y = 19 1/5
To add the fractions denominators have to be the same so 5*4 is 20 but u have to multiply the top too so its 8/20 8+9 is 17 so 17/20 20-17 is 3 so the third region is 3/20