$\"\"$ \ \

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The quick-drying concrete mix calls for $\"\"$ pounds of dry cement.

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The slow-drying concrete mix calls for $\"\"$ pounds of dry cement.

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He needs $\"\"$ times more quick-drying concrete and $\"\"$ times more slow-drying concrete.

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a.

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How many pounds of dry cement mix will he need.

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The expression that represents the requirement of slow-drying concrete is $\"\"$ .

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$\"\"$ (Rewrite the mixed fraction)

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$\"\"$ (Multiply)

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Rewrite the mixed fraction)

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Therefore, He will need $\"\"$ of dry cement.

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$\"\"$

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b.

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The expression that represents the requirement of slow-drying concrete is $\"\"$ .

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Use the properties of real numbers to solve the expression.

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$\"\"$ (Defintion of a mixed number)

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$\"\"$ (Distributive property: $\"\"$ ) \ \

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$\"\"$ (Multiply)

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$\"\"$ (Commutative property of addition: $\"\"$ )

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Add: $\"\"$ )

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$\"\"$ (Add and write the mixed fraction)

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Therefore, He will need $\"\"$ of dry cement.

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$\"\"$

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a. He will need $\"\"$ of dry cement.

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b.By using distributive property he will need $\"\"$ of dry cement.