exam Maths Puzzle Numerical Ability

A piece of copper tubing 60 inches long is cut into two unequal pieces. Each piece is formed into a square frame. If the total area of the two frames are 117 square inches, what is the length of each piece of tubing?

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exam Other Question

write the general equation form of the line which has slope 3/4 and passes
through the point(10,-2)

I am having some trouble beginning this problem...i am not sure if a chart is needed in order to graph this...please help...thank you
Multiply: 7u^6 * 4u^3
Multiple choice answers.
A) 11u^9
B) 11u^18
C) 28u^18
D) 28u^9

I get 28u^18 is this right?