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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. | |