I think it is 133 students that like Dancing with the stars
You would use distribution. So, in this case, it would be 10a - 50. You use -10 to multiply -a and 5, and you get 10a, and -50.
<span>Slices of Cheese Pizza 2 , 6, 8, 5 ½, 3 1/3, 3/5
Slices of Pepperoni Pizza 5, 15, 20, 13 ¾, 8 1/3, 1 ½
Total Slices of Pizza 7, 21, 28, 19 ¼, 11 2/3, 2 1/10</span>