exam Maths Puzzle Numerical Ability

simplify the expression. Assume that all variables represent real numbers.

Please show me how to get the answer. Thanks!

3 into sqrt (square root of) 80x^9y^11

A.) 4x^3y

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exam Other Question

the ordered pair (1, -2) is a solution of the following system..true or false?
x+y=-3
x-y=1 Dr. Kingsley took 60 ounces of a 20% gold alloy and mixed it with a 30% gold alloy to get a 24% gold alloy. How many ounces of the 30% gold alloy did he use?