Hey what's the answer

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Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?

The table shows the balance of a money market account over time. write a function that represents the balance y (in dollars) after t years.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys