Perform the indicated operation.
- 
A. 
B. - 
C. - 
D. - 
Answer: A
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Solve the problem.Find the equation of the plane perpendicular to the plane with equation x - 2y + 5z = 15 and the plane with equation3x + z = -7 and containing the point P = (-5, 0, -7).
A. x - 2y + 5z + 40 = 0 B. 3x + z + 22 = 0 C. -x + 7y + 3z - 16 = 0 D. -x + 7y + 3z + 16 = 0
Find the perimeter of the polygon.
A. 8.1 m B. 13.6 m C. 10.7 m D. 16.2 m
Find an equation of the following curve.An ellipse centered at the origin having vertex at (0, -9) and eccentricity equal to 
A. 
+ 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
+ 
= 1
Solve the problem.The price of a necklace is $5.99. If the salesperson's rate of commission is 14%, how much commission is earned on the sale of the necklace? Round to the nearest cent.
A. $8.39 B. $0.84 C. $8.49 D. $0.85