Answer:
C.
Explanation:
3/8 × -7/6 × -2/5
a/b × c/d = ac/(bd)
-×- = +
+×+ = +
(a×b)×c = a×(b×c) = (a×c)×b ...
vamos começar com
(-7/6)(-2/5) = 7/6 × 2/5 = 2×7/(6×5) = 14/30
e agora
3/8 × 14/30 = 3×14/(8×30) = 42/240 = 7/40
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