Divide.
÷ 
A. 
B. - 
C. 
D. - 
Answer: D
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Find the average value of 
over the given region.
over the rectangular solid in the first octant bounded by the coordinate planes and the planes 
, 
, 
A. 
B. 
C. 
D. 
Determine whether the given value is a solution to the given equation.
= 49.8; x = 24.9
A. Yes B. No
Write a system of equations for the problem, and then solve the system.At the beginning of a bicycle ride, Raul and Miguel are 90 miles apart. If they leave at the same time and ride in the same direction, Raul overtakes Miguel in 5 hours. If they ride toward each other, they pass each other in 2 hours. What are their speeds?
A. Raul: 32.5 mph; Miguel: 12.5 mph B. Raul: 31.5 mph; Miguel: 13.5 mph C. Raul: 13.5 mph; Miguel: 31.5 mph D. Raul: 32.5 mph; Miguel: 13.5 mph
Write an equation to describe the variation. Use k for the constant of proportionality.x varies jointly as y and the square of z.
A. x + y + z2 = k B. xyz2 = k C. x = kyz2 D. x = k + y + z2