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