please just somebody answer this question!!!!!!!!!!!! no one answering . and if you don't know the answer then just scroll and ignore -_-
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Answer:
d) -1
Step-by-step explanation:
If 9^-3m ÷ 9^-4 = 9^7
Since, bases are same, powers can be equated.
-3m - (-4) = 7
-3m + 4 = 7
-3m = 7-4
-3m = 3
m = -1
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