Select ALL the correct answers. Sylvia takes her mother out to dinner once a week during the summer. They both order the same meals at the same restaurant each time, so the bill is always x dollars. Sylvia also leaves a $6 tip when she pays the bill. She took her mother out to dinner for 12 weeks over the past summer.

Which of the following expressions could represent the total amount Sylvia pays for dinner with her mother during this time period?

a.12x + 6
b.12x + 18
c.(12)(x) + (12)(6)
d.(12)(x) + (12)(6x)
e.12x + 72
F.12(x + 6)