For problems 3 and 4 use the parabola 
to answer the questions. Write the equation of the axis of symmetry.
A. 
B. 
C. 
D. 
E. None of these
Answer: B
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Solve the problem.Simple random sampling means that
A. all members of the population have an equal chance of being in the sample. B. any two groups of members of the population of equal size have the same chance of being in the sample. C. every member of the population is automatically a member of the sample. D. every member of the population has a chance of being in the sample. E. none of these
Find the probability.If three cards are drawn without replacement from a deck, find the probability that the third card is a heart, given that the first two cards were hearts.
A. 
B. 
C. 
D. 
Combine like terms.m3 - 4m4 + 9m2 + m4 + 4m3
A. 3m4 - 5m3 - 9m2 B. -4m4 - 1m3 + 9m2 C. -3m4 + 5m3 + 9m2 D. -3m8 + 5m6 + 9m2
Solve the problem, if possible. Round your answer to the nearest tenth, when appropriate.A rug is to fit in a room so that a border of even width is left on all four sides. If the room is 12 ft by 15 ft and the area of the rug is 108ft2, how wide will the border be?
A. 2 ft B. 3.5 ft C. 1.5 ft D. 2.5 ft