1.

If 3$8 = -50, 3$5 = -20 and 2$3 = -10, then find the value of 9$1 = ?_x005F_x000D_

A. 10_x005F_x000D_
B. -20_x005F_x000D_
C. 90_x005F_x000D_
D. 80
Answer» E.


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