Express the set using the roster notation. The set of natural numbers between 6 and 10.
A. {6, 7, 8, 9, 10}
B. {6, 7, 8, 9}
C. {7, 8, 9}
D. {7, 8, 9, 10}
Answer: C
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Solve the system of equations by graphing. If the system is inconsistent or the equations are dependent, say so. 2x + y = 108x + 4y = 40
A. {(x, y)|2x + y = 10} (dependent equations) B. {(5, 0)} C. {(0, 10)} D. ? (inconsistent system)
Solve the problem.A rectangular piece of cardboard measuring 18 inches by 49 inches is to be made into a box with an open top by cutting equal size squares from each corner and folding up the sides. Let x represent the length of a side of each such square. For what value of x will the volume be a maximum? If necessary, round to 2 decimal places.
A. 21.18 in. B. 18.32 in. C. 36.64 in. D. 4.01 in.
Solve the problem.A power boat in still water maintains a speed of 20 miles per hour. The boat heads directly across a river perpendicular to the current which has a speed of 5 miles per hour. Find the actual speed and direction of the boat, rounded to the nearest whole number.
A. 10 miles per hour; 30° off course B. 21 miles per hour; 14° off course C. 11 miles per hour; 27° off course D. 20 miles per hour; 14° off course
Translate to a proportion.25 is what percent of 80?
A. 
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B. 
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C. 
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D. 
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