Will mark as brainliest. multiply the polynomials (a^2 + 3a – 7) and (2a^2 – a + 4). simplify the answer. show your work.

Which of the following is a testable hypothesis? a. if i brush my teeth, i will get fewer cavities than if i don't brush my teeth. b. green toothpaste tastes better than blue toothpaste or red toothpaste. c. smart, careful, healthy people always brush their teeth. d. it's wrong to not brush your teeth before you have an important conversation with someone.

When would a bouncy ball have the most potential energy

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.