81 is the perfect square because 9 * 9
Because the distance a car travels is directly related to the time it travels, the distance varies directly with the time: d=a*t. "a" would be the constant of variation. Just substituted the given values(300 and 5) into the equation, and you would get 300=5a. Divide both sides by 5 and you get a=60. So, the constant of variation is 60
(-3)^2+8(-3)-7
9-24-7
= -22
Your answer is -22.
The Answer Would Be 178 .