allerySimplify using commutativity and distributivity: (2/5) × (−3/7) − (1/14) − (3/7) × (3/5)
A−1/2
B−1/14
C1/2
D0
Answer & Solution
Correct answer: A. −1/2
Rearrange: (2/5)(−3/7) − (3/5)(3/7) − 1/14 = (−3/7)[(2/5) + (3/5)] − 1/14 = (−3/7)(1) − 1/14 = −3/7 − 1/14 = −6/14 − 1/14 = −7/14 = −1/2.
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