Find the center (h, k) and radius r of the circle with the given equation. 4x2 + 4y2 - 12x + 16y - 5 = 0
A. (h, k) = (- 
, 2); r = 
B. (h, k) = (
, -2); r = 
C. (h, k) = (- 
, 2); r= 
D. (h, k) = (
, -2); r = 
Answer: D
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If é = 60 and b = 7, find a.
Solve the problem.On a recent trip, Sarah's car traveled 20 mph faster on the first 110 miles than it did on the remaining 80 miles. The total time for the trip was 4 hr. Find the speed of Sarah's car on the first part of the trip.
A. 38 mph B. 58 mph C. 31 mph D. 9 mph
Solve the problem.Two boats leave a dock together, each traveling in a straight line. One boat travels at 
and the other at 
If the angle between their courses measures 
how far apart are they after 
Give your answer in miles and round your answer to the nearest tenth.
A. 30.0 miles B. 32.7 miles C. 19.5 miles D. 23.5 miles
Solve the problem. Some friends decide to throw a party. It will cost $200 to rent a recreation hall and it will cost $18 per person for drinks and snacks. Let P(n) represent the per person cost (in dollars) if there are n people who go to the party. Find a formula for P(n).
A. P(n) = 
B. P(n) = 
C. P(n) = 
D. P(n) = n(18n + 200)