Solve.An auditorium has 20 rows with 10 seats in the first row, 12 in the second row, 14 in the third row, and so forth. How many seats are in the auditorium?
A. 580
B. 400
C. 390
D. 620
Answer: A
Mathematics
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Add or subtract as indicated. Simplify if necessary.
- 
A. - 
B. 
C. - 
D. -7
Mathematics
Find the equation of a circle satisfying the given conditions.Center: (-10, 0); radius: 
A. x2 + (y - 10)2 = 25 B. x2 + (y + 10)2 = 25 C. (x + 10)2 + y2 = 5 D. (x - 10)2 + y2 = 5
Mathematics
Sketch the graph of the quadratic function.f(x) = -3x2 + 6x - 5
A. 
B. 
C. 
D. 
Mathematics
Match the polar equation with its graph.
A. r = 
B. r = 
C. r = 
D. r = 
Mathematics