If half of her boxes were burned and 22 were left, that means that she started with 44 boxes.
Answer:
a) { 15, 16, 17, 18, 19, 20}
b) { 4, 8, 12, 16, 20}
The answer is -1/3(1+9-16) = 2
3/7 as a decimal is .4285 and so on.
This is obviously less than .55
Using a system of equations, we can determine that each adult ticket costs $45 and each child ticket costs $28.