exam Maths Puzzle Numerical Ability

What is the perimeter of a triangle that has the measurments of... the square root of 5 - the square root of 3, 4, and the square root of 5 + the square root of 3?

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exam Other Question

Give an example of a rational expression P/Q such that: The degree of the denominator Q is 3 and this expression is defined for all real numbers except the values 2 and 4. Can someone help me on this problem?

I need to use the distributive property to remove the parentheses in the following expression. I then need to simplify the result if possible.

1/4(20 + 16)

Thanks,
Sher