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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?

Zahra runs a 500-meter race at a constant speed. which graph shows her distance from the finish line during the race?

Which graph of a hyperbola represents the equation 16x^2-y^2=16