book Maths Puzzle Numerical Ability

can you tell me if I have got the right answer

( 4x^5y)^3
(--------) = 48x^7
(16xy^4) -------
y^9

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book Other Question

can you solve this equation by breaking the equation by step?

The Equation is 3/2x=4=-9
The equation is:
You have at least $30.00 in change in your drawer, consisting of dimes and quarters. Write an inequality that shows the different number of coins in your drawer.