Solve the problem.The temperature of water in a certain lake on a day in October can be determined by using the model  where x is the number of feet down from the surface of the lake and y is the Celsius temperature of the water at that depth. Based on this model, how deep in the lake is the water 9 degrees? (Round to the nearest foot.)

A. 45
B. 12
C. 67
D. 30


Answer: B

Mathematics

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A. F = 
B. F = 
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What will be an ideal response?

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A. 6 B. 9 C. 27 D. 8

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Solve the equation.-9x = -54

A. 6 B. -45 C. -6 D. 45

Mathematics