1. Simplify 2(x + 10). A. 20x B. 2x + 10 C. 12x D. 2x + 20 Hint 2. Simplify –11(t + 1). A. 11t + 11 B. -11t – 11 C. -11t + 1 D. 11t + 1 Hint 3. Simplify 14(b – 10). A. 4b B. b – 140 C. 14b – 10 D. 14b – 140 Hint 4. Simplify –20(z – 5). A. -20z + 100 B. -20z – 5 C. 20z + 100 D. 20z – 5 Hint 5. Write 10 · 10 · 10 in exponential form. A. 31 B. 103 C. 13 D. 310 Hint 6. Identify the like terms in the expression 2n + 8 - 5n + 2m. A. 2n, 2m B. 8, -5n C. 2n, -5n D. no like terms Hint 7. Identify the like terms in the expression 13 + x + 4 + y. A. no like terms B. x, y C. x, 4 D. 13, 4 Hint 8. Rewrite (4s + 3t) + (11s + 2t) using parentheses so that the like terms are grouped together. A. There are no like terms. B. (4s + 2t) + (3t + 11s) C. (4s + 3t + 11s + 2t) D. (4s + 11s) + (3t + 2t) Hint 9. Rewrite (5y - z) + (6y + 12z) using parentheses so that the like terms are grouped together. A. (5y + 6y) + (-z + 12z) B. (5y + 12z) + (-z + 6y) C. (5y - z) + (6y + 12z) D. There are no like terms. Hint 10. Rewrite 9q - 5r as an addition expression by using the additive inverse. A. 9q + 5r B. 9q + (-5r) C. 5r - 9q D. (-5r) + 9q Hint