exam Maths Puzzle Numerical Ability

3 radical 2 divided by 2 minus 5 radical 2; Simplify by rationalizing the denominator.

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exam Other Question

Ed and Joe are playing war with a regular 520card deck. Ed has 8 less than twice the number of cards Joe has. Who's winning so far, and by how many cards? How do I figure this one out? 17. Build each rational expression into an equivalent rational expression with the indicated denominator.
-9z = ____?____
_____ ________
2aw 8aw