Question

please answer all questions​

Answer 1

Answer:

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Step-by-step explanation:

1. 1/9^-2 = 1/81^-1 = 81

2. -2/3^9 ÷ -2/3^3

same as;

-2/3^6 = 64/729

3. 3/2÷-5/2 (the -1 to the power of -1 cancels it out)

3/2*2/-5 = 6/-10 = -1/10 = -0.6

4. 1/3-1/5 = 5-3/15 = 2/15