The Answer wouldn't be any other number but 9. I took this test and got it right.
15% off of 120 is 102 so they’d have 18.00 off but if your adding the 10 dollar rebate they’d have 28.00
First one is
2x where x equals number of people in your class
second one is
money saved = 1/2y+6 where y equals amount of money in pay check
<span>radius = 27 cm
apothem = 13.5 cm
Since you have an equilateral triangle with a perimeter of 81*sqrt(3), you can just divide the perimeter by 3 to get the length of a side, which is 27*sqrt(3).
We can construct a triangle to get the radius as a right triangle with one leg being 27*sqrt(3)/2 in length and the angles being 60/2 = 30 and 180-90-30 = 60 degrees.
The tangent of 30 degrees is 1/sqrt(3). So the length of the other leg will be 27*sqrt(3)/2 / sqrt(3) = 27/2. And finally, the hypotenuse will be twice that since it's a 30/60/90 triangle for a length of 27. And conveniently, the hypotenuse is the radius we desire. And also, quite conveniently, the apothem is the short leg of the 30/60/90 triangle which is 27/2 = 13.5 cm.</span>
