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Which of the following expressions are equivalent to −3.5(2 − 3n) − 2.5n? A. −7 − 8n B. −7 + 8n C. −7 − 13n D. −7 − n(10.5 − 2.5) E. −7 + n(10.5 − 2.5)
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Mar 28, 2018
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Which of the following expressions are equivalent to −3.5(2 − 3n) − 2.5n?
A. −7 − 8n
B. −7 + 8n
C. −7 − 13n
D. −7 − n(10.5 − 2.5)
E. −7 + n(10.5 − 2.5)
Mathematics
middle-school
Nick Roth
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It's equivalent to B.
-3.5 x 2 = -7
-3.5 x -3n = 10.5n
-7 + (10.5n-2.5n) = -7 + 8n.
Tony Isaac
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Mar 29, 2018
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-3.5(2-3n)-2.5n=-7+10.5n-2.5n
=-7+8n
So the answer is B
LaneL
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Apr 1, 2018
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