Read carefully — this is an easy 2 point giveaway:

The total number of tickets is 150 and a is how many adult tickets and c is how many child tickets. The adult ticket is $10.25 and the child ticket is $7.75 so this has to go with the $$.

The total number of tickets is 150 and a is how many adult tickets and c is how many child tickets. The adult ticket is $10.25 and the child ticket is $7.75 so this has to go with the $$.