Solve the problem.A stack of poles has 20 poles in the bottom row, 19 poles in the next row, and so on, with 5 poles in the top row. How many poles are there in the stack?
A. 205
B. 177
C. 195
D. 200
Answer: D
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Which of the following is equivalent to: Twice a number increased by 7 is 42?
A. ?2n + 7. B. ?2n + 7 = 42. C. ?2(n + 7) = 42. D. ?Twice a number is equal to 35. E. ?2n = 28
Add or subtract. Simplify your answer to lowest terms.
- 
A. 
B. 
C. 
D. 
Solve the problem.Two groups of people were asked their preference in television programs from among three new programs. The results are shown in the table below. What is the probability that a person selected at random will be from group A or prefer program X?Television ProgramGroup of PeopleXYZA251540B206050
Fill in the blank(s) with the appropriate word(s).
Find the center, foci, and vertices of the ellipse.81x2 + y2 - 648x + 1,215 = 0
A. 
+ (y - 9)2 = 1
center: (9, 0); foci: (9, 
), (9, -4
); vertices:(9, 4),
(9, -4)
B. 
+ (y - 4)2 = 1
center: (4, 0); foci: (4, 4
), (4, -4
); vertices:(4, 9), (4, -9)
C. (x - 4)2 + 
= 1
center: (4, 0); foci: (4, 4), (4, -4
); vertices:(4, 9), (4, -9)
D. (x - 9)2 + 
= 1
center: (9, 0); foci: (9, 
), (9, -
); vertices:(9, 4), (9, -4)