Carlo works as a waiter. he works double shifts 6 days a week. the lunch shift is 3 hours and the dinner shift is 5 hours. find the total number of hours he works per week.

pay attention in your classes and concentrate the best thing you can do to raise your test scores is to pay attention when you're supposed to be learning the material: in class!

take good notes.

do your homework.

use mnemonics and other tricks.

do practice tests.

note: the best i know.