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If 3#5 = -20, 1#4 = -30 and 6#5 = 10, then find th...
1.
If 3#5 = -20, 1#4 = -30 and 6#5 = 10, then find the value of 4#9 = ?
A.
70
B.
-60
C.
-50
D.
-70
Answer» D. -70
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