Find the center (h, k) and radius r of the circle with the given equation. x2 + y2 + 14x - 6y + 58 = 25
A. (h, k) = (3, -7); r = 5
B. (h, k) = (-7, 3); r = 5
C. (h, k) = (7, -3); r = 25
D. (h, k) = (-3, 7); r = 25
Answer: B
You might also like to view...
Factor completely.20x4 + 31x2 + 12
A. (5x2 - 4)(4x2 - 3) B. (20x2 + 3)(x2 + 4) C. (4x2 + 1)(5x2 + 12) D. (4x2 + 3)(5x2 + 4)
Find the volume of the solid generated by revolving the shaded region about the given axis.About the y-axis
A. 
?
B. 3?
C. 
?
D. 18?
Multiply.[(5x - y) + 2z][(5x - y) - 2z]
A. 25x2 + y2 + 20xz + 4yz - 4z2 B. 25x2 + y2 - 4z2 C. 25x2 - 10xy + y2 - 4z2 D. 25x2 - 10xy + y2 + 20xz + 4yz - 4z2
Solve the problem.A pharmaceutical company claims that the concentration of a drug in a patient's bloodstream will be at least 25% for 8 hours. Suppose that clinical tests show that the concentration of the drug (as a percent) t hours after injection is given by 
During what time period is the concentration at least 25%?
A. 1 hours ? t ? 9 hours B. 1 hours ? t ? 5 hours C. 0 hours ? t ? 8 hours D. 2 hours ? t ? 10 hours