Solve.The sum of a number and 1 times its reciprocal is -2. Find the number.
A. 0
B. -1
C. 1
D. -2
Answer: B
Mathematics
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An inlet pipe can fill a tank in 8 minutes. A drain can empty the tank in 10 minutes. If the tank is empty and both the pipe and drain are open, how long will it take before the tank overflows?
A. 38 minutes B. 20 minutes C. 2 minutes D. 50 minutes E. 40 minutes
Mathematics
Write as a decimal.77%
A. 0.77 B. 0.66 C. 0.077 D. 7.7
Mathematics
Find all solutions of the equation in the interval [0, 2?).csc 3x = 0
A. ?
B. 
C. 
D. 
Mathematics
The histogram shows the scores of each participant in a game from a total of 100 participants. Use the histogram to answer the question. 
How many more participants scored 80-99 than 0-19?
A. 32 participants B. 16 participants C. 4 participants D. 10 participants
Mathematics