exam Maths Puzzle Numerical Ability

This problem is very similar to one on my homework project. Can you please help explain how to work this problem properly.

(2√3a - √b)( √3a + 3√b)

Her

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exam Other Question

write an inequality for the situation
Allen can spend at most $10.00 on party supplies. Plates cost $3.00 per packages and napkins cost $2.00 per package.
Write in "y=...." form

5x+10=10y