Find the center (h, k) and the radius r of the circle.x2 - 10x + y2 + 10y + 31 = 0
A. (h, k) = (-5, 5); r = 
B. (h, k) = (-5, 5); r = 19
C. (h, k) = (5, -5); r = 19
D. (h, k) = (5, -5); r = 
Answer: D
Mathematics
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A. 0.77 B. -0.26 C. -0.21 D. 0.72
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Find all values of ? in [0°, 360°) that satisfy the equation.sin ? = - 
A. 45°, 315° B. 135°, 225° C. 225°, 315° D. 45°, 225°
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Graph the hyperbola.
- 
= 1
A. 
B. 
C. 
D. 
Mathematics
Solve the problem. Round to the nearest tenth of a percent, if necessary.Enrollment in a business seminar increased from 71 people to 85 people. What was the percent of increase?
A.
| 83.5% |
B.
| 16.5% |
C.
| 80.3% |
D. 19.7%
Mathematics