Add or subtract as indicated.(5m2n - 7mn + 5mn2) - (9m2n + 2mn - 6mn2)
A. -4m2n + 2
B. -4m4n2 - 9m2n2 + 11m2n4
C. -4m4n2 - 9mn + 11m2n4
D. -4m2n - 9mn + 11mn2
Answer: D
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Simplify.
A. 
B. 
C. - 
D. - 
Solve the problem.Suppose your job is to take phone orders for automotive parts. Use the table below to answer the following questions. Write the correct part number that matches what you hear the customer say on the phone.?
"Please send the 7-hundredths inch part."
A. D B. B C. I D. A
Solve the problem.The winning speeds for the Grayslake 250 race from 1980-1992 are approximated by the linear equation 
In the model, x = 0 corresponds to 1980, x = 1 to 1981, and so on. A portion of the graph of the equation is shown on the accompanying screen, along with the coordinates of a point on the line. How can this point be interpreted in the context of the model?
A. It means that the winning speed in the year 1990 will be the same as in the year 2203. B. It means that the winning speed was between 10 and 224 miles per hour. C. It means that in the year 1990, the winning speed was approximately 224 miles per hour. D. It means that 10 years from now, the winning speed will be approximately 224 miles per hour.
Solve the problem.The weight W of an object on the Moon varies directly as the weight E on earth. A person who weighs 112 lb on earth weighs 22.4 lb on the Moon. How much would a 191-lb person weigh on the Moon?
A. 0.2 lb B. 38.2 lb C. 955 lb D. 325.4 lb