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Review Sheet A Substitution And Solving Inequalities

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Review Sheet A Substitution And Solving Inequalities

  1. 1. Review Sheet A: Substitution and Solving Inequalities - Chapter 10
  2. 2. Simplify the following expressions using substitution. <ul><li>1. 5x when x = -8 </li></ul>5(-8) = -40 2. x 2 when x = -9 (-9) 2 = 81
  3. 3. <ul><li>3. -x 2 + 7 when x = 5 </li></ul>Simplify the following expressions using substitution. -(5) 2 + 7= -18 4. x 2 - 8xwhen x = -6 (-6) 2 - 8(-6)= 84
  4. 4. <ul><li>5. x 2 + 4x - 1 when x = 3 </li></ul>Simplify the following expressions using substitution. (3) 2 + 4(3) - 1 = 20
  5. 5. Solve the following one step inequalities. <ul><li>6. x - 9 > -4 </li></ul>+ 9 +9 x > 5 7. x < -7 -3 • -3 •-3 x > 21
  6. 6. Solve the following two step inequalities. <ul><li>8. 6x - 8 ≥ 46 </li></ul>+8 +8 6x ≥ 54 ÷6 ÷6 X ≥ 9 9. -5 ≥ -x - 6 +6 +6 1 ≥ -x ÷-1 ÷-1 -1 ≤ x
  7. 7. Graph the following inequality. <ul><li>10. x + 5 > 10 </li></ul>-5 -5 x > 5

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