College Algebra Unit I Practice Exam Worksheet With Answer Key Page 8
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12Complete the square and write the equation in standard form. Then give the center and radius of the circle.
38) x 2 + y 2 - 2x - 12y + 37 = 4
38)
A) (x - 1) 2 + (y - 6) 2 = 4
B) (x - 6) 2 + (y - 1) 2 = 4
(-1, -6), r = 4
(-6, -1), r = 4
C) (x - 6) 2 + (y - 1) 2 = 4
D) (x - 1) 2 + (y - 6) 2 = 4
(6, 1), r = 2
(1, 6), r = 2
Graph the equation.
39) (x - 1) 2 + (y - 3) 2 = 36
39)
A)
B)
Domain = (-7, 5), Range = (-9, 3)
Domain = (-5, 7), Range = (-3, 9)
Solve the problem.
40) The equation V = -2000t + 24,000 describes the value (V) in dollars of a certain model of car after it is
40)
t years old. What is the age of the car, if it is currently worth $16,000?
A) 6 years
B) 5 years
C) 3 years
D) 4 years
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