Simplify.
2 ÷ 
A. 
B. 
C. 
D. 
Answer: C
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Solve the problem.In a certain lottery, 3 different numbers between 1 and 12 inclusive are drawn at random. These are the winning numbers. If you choose 3 different numbers at random between 1 and 12, what is the probability you will match the winning numbers? Assume that the order of the numbers is unimportant.
A. 
B. 
C. 
D. 
Graph.7x2 + 2y2 = 14
A. 
B. 
C. 
D. 
Factor.8x3 - 1000y3
A. (8x - 5y)(x2 + 5y + 200y2) B. 8(x - 5y)(x2 + 25y2) C. 8(x + 5y)(x2 - 5xy + 25y2) D. 8(x - 5y)(x2 + 5xy + 25y2)
Solve the problem. Round to the nearest tenth, if necessary.Two pipes together can fill a large tank in 10 hr. One of the pipes, used alone, takes 15 hr longer than the other to fill the tank. How long would each pipe take to fill the tank alone?
A. 25 hr; 40 hr B. 15 hr; 30 hr C. 12.5 hr; 27.5 hr D. 10 hr; 25 hr