What is 6 and 3/4 minus 1 and 1/4

You call the pizza store and find out that eachpizza has 12 slices. you expect 16 people tocome, and you estimate each person will eat 3slices. how many pizzas should you order

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x

Solve 2 - 3 cos x = 5 + 3 cos x for 0° ≤ x ≤ 180° a. 150° b. 30° c. 60° d. 120°