10. Un buzo estaba a 25 pies debajo de la superficie del mar. Descendió 20 pies más. ¿A cuántos pies esta ahora debajo de la superficie del mar?*
(1 Punto)
A. - 45
B -5
C 20
D 40

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{ {