7. 150 students
8. 320 bags
9. 600 families
10. 160 diners
in this one x=9 ask if you need an explanation
A = bh/2
2a = bh
2a/b = h
h = 2a/b
Answer:
I think it's 44 aren't you adding?
You have to choose 1 sort of cheese from 3 ( 3 ways ). Also you have to choose 3 toppings from 12 different toppings:
12 * 11 * 10 = 1,320 ways.
In total: 3 * 1,320 = 3,960
Answer:
In 3,690 ways can pizza be made with 1 cheese and 3 toppings.
