Write a system of equations to describe the situation. Do not solve the system.Istafan has $12 less in his pocket than Yvonne has. If Yvonne had $6 more, she would have 3 times as much money as Istafan.
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Solve the problem.The disk (x - 4)2 + y2 ? 9 is revolved about the y-axis to generate a torus. Find its volume. (Hint: 
= 
?, since it is the area of a semicircle of radius 3.)
A. 36? B. 72?2 C. 18?2 D. 36?2
Mathematics
Identify the intersection of the plane with the solid.Egg-shaped
The remainder of the figure is below the plane.
A. Semicircle
B. Circle or oval
Mathematics
Write the interval in set-builder notation and graph the set on a number line.(-?, 5)
A. {x|x ? 5}
B. {x|x < 5}
C. {x|x > 5}
D. {x|x ? 5}
Mathematics
Find the unknown value in the percent proportion 
Round to the nearest tenth, if necessary.part = 29, whole = 29
A. percent = 200% B. percent = 0% C. percent = 1% D. percent = 100%
Mathematics