Decide whether the statement is always true, sometimes true, or never true.The difference between two positive numbers is positive.
A. Never true
B. Always true
C. Sometimes true
Answer: C
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Solve the system by substitution.x2 + y2 = 5x + y = 3
A. (-2, 1), (-1, 2) B. (2, 1), (1, 2) C. (-2, -1), (-1, -2) D. (2, -1), (1, -2)
Use l'Hopital's Rule to evaluate the limit.
A. - 
B. 
C. 
D. 1
As part of a statistics project, a 6th grade teacher brings to class a container with 300 red marbles and 500 white marbles which are thoroughly mixed. To figure out how many marbles in the container are red without actually counting them all, a student randomly draws 40 marbles from the container. Of the 40 marbles drawn, 16 are red.Suppose that the student is given the N-value. What is a reasonable estimate for the number of red marbles in the container?
A. 107 B. 300 C. 480 D. 320 E. none of these
Find the real roots of the equation by factoring.
?
?
A. 
B. 
C. 
D. 
E. 