book Maths Puzzle Numerical Ability

what is 5 radical 2 squared?

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book Other Question

Please help me solve this fraction: 8(-3)/[(2+3)^3(2)]

I know you are supposed to do the exponent first but I can not remember if you add 2+3 then raise it to 3 or raise each f a. Find the area of a rectangle with sides 2x-7 and x+14
b. A rectangle has sides (x+9) and (2x+15). Find x if its perimeter is to be 300 units.