Write the letter for the correct answer in the blank at the right of each question. 1. Write an algebraic expression for 12 decreased by a number times 7. 2. Evaluate 20 + 3(8 -5). Evaluate each expression if a = 4, b = 6, and c =2. 3. ab - c 46 - 0=44 4. 3a + b2c 5. Simplify 4(w - 9). 6. Simplify 3r + 2(t + 5r). 7. Name the property used in (5 + 2) + n = 7 + n. A Additive Identity C Reflexive Property B Multiplicative Identity D Addition