Solve the problem.From a point on a straight road, two cars are driven in opposite directions, one at 71 miles per hour and the other at 54 miles per hour. In how many hours will they be 375 miles apart?
A. 3 hours
B. Not enough information
C. 2 hours
D. 4 hours
Answer: A
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Solve.Two machines are turned on at 8:00 A.M. If one can produce 58 items each hour and the other can produce 75 items each hour, at what time will they produce a total of 798 items?
A. 1:00 P.M. B. 3:00 P.M. C. 2:00 P.M. D. 3:30 P.M.
Simplify the rational expression.
A. 
B. -1
C. -x
D. 1
Let 
, 
. Find the rule for the function
src="https://sciemce.com/media/3/ppg__cognero__2.2_The_Algebra_of_Functions__media__9577a8dd-fcdd-42d2-a93d-45a1595e22d4.PNG" style="vertical-align: middle;" />. What will be an ideal response?
Assume that college graduates and noncollege graduates have children in the same numbers. Suppose also that 70% of the children of college graduates also graduate from college. Of the children of noncollege graduates, 20% will graduate from college. If this trend continues, then in the long run, what is the proportion of the population that will be college graduates?
A. 
B. 
C. 0
D. 
E. none of these