Solve the problem.Find the standard form of the equation of the circle. Assume that the center has integer coordinates and the radius is an integer. 
A. x2 + y2 + 2x - 4y - 4 = 0
B. (x + 1)2 + (y - 2)2 = 9
C. x2 + y2 - 2x + 4y - 4 = 0
D. (x - 1)2 + (y + 2)2 = 9
Answer: B
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Solve the variation problem.The amount of time it takes a swimmer to swim a race is inversely proportional to the average speed of the swimmer. A swimmer finishes a race in 30 seconds with an average speed of 5 feet per second. Find the average speed of the swimmer if it takes 37.5 seconds to finish the race.
A. 3 feet per second B. 6 feet per second C. 5 feet per second D. 4 feet per second
Find the acute angle, in radians, between the lines.7x - 5y = 4 and 2x - 9y = -2
A. 0.7439 radians B. 2.303 radians C. 0.8389 radians D. 0.7319 radians
Write an inequality involving absolute value that describes the graph shown.
A. 
? 2
B. 
? -6
C. 
? 2
D. 
? 2
Write the fraction or mixed number as a percent. If necessary, round the percentage to the nearest tenth.
A. 20% B. 250% C. 5% D. 50%