Simplify the expression. Assume that all variables represent positive real numbers.(27x15)-2/3
A. 9x9
B. 9x5
C. 
D. 
Answer: C
Mathematics
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Solve the problem.Noah and Ben are running in the Walker Street Fun Run. Noah runs at 7 mph, Ben at 5 mph. If they start at the same time, how long (in minutes) will it be before they are 
mile apart?
A. 10 min B. 6 min C. 24 min D. 150 min
Mathematics
Use Cramer's rule to solve the linear system.-2x - 9y + 8z = -327x + 3y + 4z = 1014x - 9y - 2z = -28
A. (9, 6, 5) B. (6, 5, 6) C. (10, 4, 5) D. (9, -6, -5)
Mathematics
Determine whether propositions p, q, and r each need to be true or false to make the proposition below false.
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Mathematics
Convert. When necessary, round the answer to two decimal places.10,500 pounds = ____ tonsGive your answer as a mixed number.
A. 10
B. 5
C. 4
D. 7
Mathematics