Rationalize the denominator and simplify.
A. 
B. 6
C. 
D. 
Answer: C
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Find the moment or center of mass of the wire, as indicated.Find the moment about the x-axis of a wire of constant density that lies along the curve y = 2
from 
to 
.
A. 21
B. 
C. 14
D. 
Solve the problem.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. 620 seats B. 400 seats C. 390 seats D. 580 seats
Solve the system by the elimination method or a combination of the elimination and substitution methods.x2 + 4xy + 2y2 = 1 x2 - 4xy - 2y2 = 1
A. {(1, 0), (-1, 0), (1, -2), (-1, 2)} B. {(1, 1), (-1, -1), (1, -2), (-1, 2)} C. {(1, 0), (1, 1)} D. {(1, -2), (-1, 2)}
Find the indicated sum. Find the sum of the first 9 terms of the geometric sequence: 
, 
, 
, 
, 
, . . .
A. 
B. 
C. 101
D. 