Simplify each expression using order of operations.
4. 24 + (8-5)
5. 4 + 7 X2
6. 9-9 + 22
7.8 x 3 + 6-1
8. 3 + 12 - 2
9. 4+ (3 X 6) - 3

15. jiovanni is looking in to two different companies that offer study guides for math exams.test prep 101 charges a $5 flat fee and an additional $0.25 per problem.math charges a $2 flat fee and an additional $0.50 per problem.how many prablems would make the costs of the two companies be equal? varibles: equations/eniqualities{ {