Factor by grouping.3x + 24 + xy + 8y
A. (x + 8y)(3 + y)
B. (y + 8)(3x + y)
C. (y + 8)(x + 3)
D. (x + 8)(3 + y)
Answer: D
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Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves about the given lines.y = 4x,
y = 0,
x = 4; revolve about the x-axis
A. 
B. 
?
C. 
?
D. 
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Write an equation for the parabola.
A. (y + 2)2 = -12(x - 3) B. (x - 3)2 = 12(y + 2) C. (x + 3)2 = -12(y - 2) D. (x + 2)2 = -12(y - 3)
Multiply.
? 
A. 
B. 
C. 
D. 
Use the formulas relating distance, rate, and time.A family began a trip of 375 miles at 8 A.M. They arrived at their final destination at 3:30 P.M. If they took three 20-minute breaks and took a half hour for lunch, what was their average rate? Round to the nearest tenth if necessary.
A. 57.7 mph B. 62.5 mph C. 53.6 mph D. 68.2 mph