Which conjunction or disjunction is equivalent to the open sentence |a – 9| ≤ 4. a. a – 9 ≥ 4 and a – 9 ≤ –4 b. a – 9 ≤ 4 or a – 9 ≥ –4 c. a – 9 ≤ 4 and a – 9 ≤ –4 d. a – 9 ≤ 4 and a – 9 ≥ –4

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.