Answer:
40 children went on the cruise.
Step-by-step explanation:
This question can be solved by a system of equations.
I am going to say that:
x is the number of adults on the cruise
y is the number of children on the cruise.
57 tickets were sold:
This means that , and since we want the number of children y,
Each adult had to pay $22 for the cruise and each child had to pay $10. The company's total receipts were $774.
This means that:
Since
40 children went on the cruise.