Simplify.
A. 13
B. 84
C. 14
D. Not a real number
Answer: A
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Decide where the first digit in the quotient would be located. Then without finishing the division, determine which of the three choices is the correct answer.
A. 9 B. 930 C. 93
Solve using Cramer's rule. 2x - 2y = 2 3x + 4y = 59
A. (-8, 9) B. (-9, -8) C. (8, 9) D. (9, 8)
Solve the problem.Three trains - one eastbound, one westbound, and one northbound - leave a city at the same time. The speed of the northbound train is 10 miles per hour greater than the speed of the eastbound train. After 8 hours, the distance between the westbound train and the eastbound train is 560 miles. Twice the speed of the westbound train is 40 miles per hour more than the speed of the northbound train. Find the speeds of the three trains.
A. eastbound, 30 mph; westbound, 40 mph; northbound, 40 mph B. eastbound, 20 mph; westbound, 50 mph; northbound, 40 mph C. eastbound, 40 mph; westbound, 40 mph; northbound, 30 mph D. eastbound, 40 mph; westbound, 40 mph; northbound, 50 mph
Choose the most reasonable metric length unit. Choose from km, m, cm, and mm.The book is 22 
long.
A. cm B. mm C. km D. m