Write the augmented matrix for the system of equations.7x + 8y - 12z + w = 94y + z = 10x - y - 3z = -15x - 5y + 2z = 2
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Perform the indicated operations.(-60) ÷ (-5) ? 
A. 2
B. - 
C. -72
D. - 2
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An inlet pipe can fill a tank in 4 minutes. A drain can empty the tank in 6 minutes. If the tank is empty and both the pipe and drain are open, how long will it take before the tank overflows?
A. 10 minutes B. 6 minutes C. 2 minutes D. 22 minutes E. 12 minutes
Mathematics
Find the limit if it exists. 
What will be an ideal response?
Mathematics
Rewrite.45 as a percent
A. 450% B. 0.45% C. 4500% D. 4.5%
Mathematics