exam Maths Puzzle Numerical Ability

Explain why 2 to the -3 power equals to 1 over 2 to the 3 power?

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exam Other Question

adrian purchased 20 ballet tickets for a total of $1110.How much would it have cost him for 150 ballet tickets solve using both the rate and proportion methods i have this problem:


m+6.5=9=-9m-130)
How do I Solve it?