Write the expression in interval notation. Graph the interval.x ? -9
A. (-9, ?]
B. [-9, ?]
C. (-9, ?)
D. [-9, ?)
Answer: D
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Solve. If needed, round money amounts to two decimal places and all other amounts to one decimal place.The manager of a coffee shop has one type of coffee that sells for $9 per pound and another type that sells for $15 per pound. The manager wishes to mix 80 pounds of the $15 coffee to get a mixture that will sell for $11 per pound. How many pounds of the $9 coffee should be used?
A. 240 pounds B. 160 pounds C. 120 pounds D. 80 pounds
Match the function to its graph.y = -tan (x + ?)
A. 
B. 
C. 
D. 
Determine whether the relation is a function.Percent of work force in a certain town commuting by: 
A. It is a function. B. It is not a function.
Solve the problem.A rectangular board is 4 units by 12 units. How far from the long side of the board will the foci be located to determine the largest elliptical tabletop?
A. 4.0 units B. 5.7 units C. 2.0 units D. 0.3 units