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13 June, 11:47

Write the following as an expression.

I mix a gallons of 30% salt solution with b gallons of 15% salt. How much salt is in the mixture?

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  1. 13 June, 12:06
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    0.3a + 0.15b

    Explanation:

    "a gallons of 30% salt solution" contains 0.3a gallons of salt

    "b gallons of 15% salt solution" contains 0.15b gallons of salt

    The total amount of salt in the mixture is the sum of the two.

    Answer: 0.3a + 0.15b
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