Simplify each expression. Justify each step. 1. (12 + 8x) + 13

2. (7-7) + 12

3. (5 x m) x 7

What are “like terms”? why can we only add like terms?

Identify the type of observational study described. a statistical analyst obtains data about ankle injuries by examining a hospital's records from the past 3 years. cross-sectional retrospective prospective

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.