Answer: 81
To get this answer, you do two things
1) Take half of the x coefficient 18 to get 9
2) Square the result from the previous step to get 9^2 = 9*9 = 81
This value is added on to get x^2+18x+81 which factors to (x+9)^2 confirming we have a perfect square trinomial
There are 5280 feet in a mile.
<span>A statistical question is one that can be answered by collecting data and where there will be variability in that data.</span>
