Factor out the greatest common factor.5x2 + 45x
A. 5x2(x + 9)
B. x(5x + 45)
C. 5x(x + 9)
D. 5x(x + 45)
Answer: C
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Identify the numeral as Babylonian, Mayan, or Greek. Give the equivalent in the Hindu-Arabic system.
A. Mayan; 5046 B. Babylonian; 8651 C. Mayan; 491 D. Mayan; 286
Add.+ 
A. 780.337 B. 780.347 C. 780.247 D. 780.346
Solve.A jet plane traveling at a constant speed goes 1200 miles with the wind, then turns around and travels for 1000 miles against the wind. If the speed of the wind is 50 mph and the total flight took 4 hours, find the speed of the plane in still air.
A. 525 mph B. 550 mph C. 605 mph D. 435 mph
Solve the right triangle using the information given. Round answers to two decimal places, if necessary. 
a = 7, b = 4; Find c, A, and B.
A. c = 8.06 A = 60.26° B = 29.74° B. c = 8.06 A = 61.26° B = 28.74° C. c = 5.74 A = 61.26° B = 28.74° D. c = 5.74 A = 60.26° B = 29.74°