Find the center and the radius of the circle.y2 + 20y + 100 = 6x - x2 + 7
A. (3, 12); r = 7
B. (3, 11); r = 5
C. (2, 10); r = 6
D. (3, -10); r = 4
Answer: D
Mathematics
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A. 2 B. -54 C. 54 D. -8
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A. 
B. 
C. 
D. 
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Solve.The braking distance D in feet required for a car traveling x miles per hour to stop on dry, level pavement can be approximated by 
Calculate the braking distance for 43 miles per hour. If necessary, round the answer to the nearest tenth of a foot.
A. 1849 ft B. 3.9 ft C. 473 ft D. 168.1 ft
Mathematics