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14 August, 16:14

1. (SLO) Simplify the expression: 6 (b-7)

A. 6b-7

B. 6b-42

C. b-42

D. 6b+42

2. (SLO) Use the distributive property to rewrite the expression: 3 (4x+6y+2)

A. 12x+6y+2

B. 12x+6y+6

C. 12x+18y+2

D. 12x+18y+6

3. (SLO) Use the distributive property to rewrite the expression without parentheses: - (6x+5y)

A. - 6x - 5y

B. 6x - 5y

C. - 6x + 5y

D. 6x - 5y

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Answers (2)
  1. 14 August, 18:05
    0
    1) 6 (b - 7)

    = 6 (b) - 6 (7)

    = 6b - 42

    Answer: B

    2) 3 (4x + 6y + 2)

    = 3 (4x) + 3 (6y) + 3 (2)

    = 12x + 18y + 6

    Answer: D

    3) - (6x + 5y)

    = - 1 (6x) - 1 (5y)

    = - 6x - 5y

    Answer: A
  2. 14 August, 20:11
    0
    1 → B

    multiply each term in the parenthesis by the 6 outside

    6 (b-7) = 6b - 42

    2 → D

    multiply each term in the parenthesis by the 3 outside

    3 (4x+6y+2) = 12x+18y+6

    3 → A

    the value outside the parenthesis is - 1, hence each term inside is multiplied by - 1

    -1 (6x+5y) = - 6x - 5y
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