Use the Pythagorean theorem
Side = sqrt(8^2 - 6^2)
Side = sqrt(64-36)
Side = sqrt(28)
Side = 5.29
Rounded to nearest tenth = 5.3
Y=1.5x+2 because the rate of change is 1.5 and the y intercept is 2
Additive indentity

n = 1
a variable is always a number itself remember 7+n
5+2 = 7