Obtain an equivalent system by performing the stated elementary operation on the system.Replace the fourth equation by the sum of itself and 3 times the second equation
A. 
B. 
C. 
D. 
Answer: A
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Use <, >, or = to make a true statement.-9
-9.4
A. = B. < C. >
A waste water system is being installed in a small town.The large pipes required to reach from the town to the water treatment plant come in 20-foot and 24-foot lengths. The city planner finds that twelve fewer of the 24-foot pipes will be required than if the 20-foot pipes were used. What is the distance from the town to the water treatment plant?
What will be an ideal response?
Solve the problem.The number of quarters needed to double an investment when a lump sum is invested at 10%, compounded quarterly, is given by n = 
Find n, rounded to the nearest tenth.
A. 24.1 quarters B. 33.1 quarters C. 28.1 quarters D. 31.1 quarters
Solve. Simplify the answer.Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 10 hours. If he trained for 3
hours on the first day and 1
hours on the second day, how many hours would he need to train on the third day?
A. 5
hr
B. 5 hr
C. 5
hr
D. 4
hr