Perform the row operation(s) on the given augmented matrix.
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Subtract.85,725 - 15,049
A. 70,576 B. 71,076 C. 70,676 D. 72,076
Mathematics
Solve the problem.In the following formula, y is the minimum number of hours of studying required to attain a test score of x: 
How many hours of study are needed to score 90?
A. 31.70 hr B. 101.08 hr C. 7.86 hr D. 3.17 hr
Mathematics
Solve.The FDA approves a new drug and has confirmed by independent research that the strength of the reaction to the drug is given by the formula 
where d is the dosage amount of the drug and ? is a constant. Find an equivalent expression for S(d) by factoring out a common factor.
A. S(d) = d2
B. S(d) = 
(? - d)
C. S(d) = 
D. S(d) = d2
Mathematics
Find the perimeter.
A. 104 m B. 52 m C. 77 m D. 79 m
Mathematics