exam Maths Puzzle Numerical Ability

How many yards of material from a 24-yard length of cloth remain after 3 pieces, each 3 1/2 yards long, and 5 pieces, each 2 1/4 yards long are removed?

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exam Other Question
(-2b6 + 3b4 - b2) + (b6 + 2b4 + 2b2). Please show me how to solve adding and subtracting polynomials A metallurgist has one alloy containing 20% copper and another containing 70% copper. How many pounds of alloy must he use to make 50 pounds of the a third alloy containing 50% copper?

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