book Maths Puzzle Numerical Ability

Please help, I have tried many ways and seem to not get an answer
the four corners are cut from an 81/2 inch by 11 inch sheet of paper. Corners are 2in find the perimeter of the

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I need your help on Proportions and Rational Expressions.
Please show your steps, and explain well.
/ will define a fraction, "divided by" is a division symbol... I hope I wrote A mixture of 30 lbs. of candy sells for $1.10 a pound. The mixture consists of chocolates worth $1.50 a pound and chocolates worth 90� a pound. How many pounds of each kind were used to make the mixture?