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If the length of a side of a square is increased by 3 centimeters, the perimeter of the new square is 40 centimeters more than twice the length of a side of the original square. Find the dimensions of the original square.
A student with 1.875 GPA has 24 credit hours. Find how many credit hours of Bs (at 3 points per credit hour). He will need to raise his GPA to a 2.40.
Melanie can paint a certain barn by herself in X day. Her helper Malissa can paint the same barn by herself in 2x days. Write a rational expression for the fraction of the barn that they complete in one day by working together. Evaluate the expression for x=5.
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