Question

the cost of a field trip is $220 plus $7 per student. if the school can spend at most $500, how many students can go on the field trip?

Answer 1

Subtract 220 from 500 to get the amount that you have for students.
you should have 280 left

then divide that by 7

here's a easy way to do this. If you know that 28/7 is 4, then 280/7 will be the same as 4•10 since 28•10 is 280

4•10=40, which means 40 students can go on this trip.