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Review for Unit 2 Quiz 1

Prepare for Unit 2 Quiz 1 by reviewing linear expressions, equations, and approximating/simplifying radicals. Solve practice problems and check the answers together.

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Review for Unit 2 Quiz 1

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  1. Review for Unit 2 Quiz 1

  2. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Linear expressions Combine like terms. SHOW EACH STEP! (a) (8x – 4)7 + 2 (b) 8z + 9(3z -2)

  3. Linear expressions Answers for previous slide Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Combine like terms. SHOW EACH STEP! (a) (8x – 4)7 + 2 (b) 8z + 9(3z -2) 56x – 28 + 2 8z + 27z – 18 56x – 26 35z - 18

  4. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Linear equations Solve for x. SHOW EACH STEP! 5x – 10 + x + 13 = -3

  5. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Linear equations Answers for previous slide Solve for x. SHOW EACH STEP! 5x – 10 + x + 13 = -3 6x – 10 + 13 = -3 6x + 3 = -3 6x + 3 – 3 = -3 -3 6x = -6 66 x = - 1

  6. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Approximating radicals Approximate the non-perfect square roots below to the nearest tenth.

  7. Approximating radicals Answers for previous slide Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Approximate the non-perfect square roots below to the nearest tenth. 7845 .93 .6 7.94.7

  8. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Simplifying radicals Simplify the radical below. (1) (2)

  9. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Simplifying radicals Answers for previous slide Simplify the radical below. (1) = x = 4 (2) = x = 3

  10. Changing repeating decimals To fractions Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Change the repeating decimals to fractions. (a) .5 (b) .24 (c) 2.7

  11. Changing repeating decimals To fractions Answers for previous slide Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. Change the repeating decimals to fractions. (a) .5 (b) .24 (c) 2.7 x = .5 x=.24 x= .7 10x= 5.5 100x=24.24 10x = 7.7 - x = - .5-x= .5 -x = - .7 9x = 599x = 249x = 2 9 9 99 99 9

  12. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. The real number system • A rational number is _______________________________________________________________________. Give 2 examples. • An irrational number is _______________________________________________________________________. Give 2 examples.

  13. Review for U2 Quiz 1 Solve . We will check them together. I will answer questions when we check answers. The real number system Answers for previous slide • A rational number is a real number that can be written as a ratio of 2 integers or as a fraction. Give 2 examples. (any: terminating decimals, repeating decimals, fractions, whole numbers, natural numbers, integers, perfect square roots, perfect cube roots) • An irrational number is a real number that can NOT be written as a ratio of 2 integers or as a fraction. Give 2 examples.(any: non-terminating decimals, non-repeating decimals, non-fractions, non-perfect square roots, non-perfect cube roots)

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