11. Evaluate the expression for k = 2 and n = -3. k2 (4k 9n) + 2n – – 12. Simplify by combining like terms. 3r 6r + 9 + r – 13. Simplify by combining like terms. 2x + 4x2 8x + 9x2 – 14. Solve the equation. 8y 7 5y + 6 = 0 – – 15. Solve the equation. 27 (x + 8) = 5x 5 – –
11. Evaluate the expression for k = 2 and n = -3. k2 – (4k – 9n) + 2n 12. Simplify by combining like terms. 3r – 6r + 9 + r 13. Simplify by combining like terms. 2x + 4x2 – 8x + 9x2 14. Solve the equation. 8y – 7 – 5y + 6 = 0 15. Solve the equation. 27 – (x + 8) = 5x – 5