Decide whether or not the equation has a circle as its graph. If it does not, describe the graph.x2 + y2 + 18x + 14y + 211 = 0
A. no; the graph is nonexistent
B. no; the graph is the point (-9, -7)
C. yes
D. no; the graph is the point (9, 7)
Answer: A
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Express the exercise as a system of linear equations, then find the solution. Use a calculator where appropriate.The three angles in a triangle always add up to 180°. If one angle in a triangle is 63° and the second is 2 times the third, what are the three angles?
A. 63°, 76°, 41° B. 63°, 78°, 39° C. 63°, 77°, 40° D. 63°, 79°, 38°
Perform the indicated operation.(3x - 2) + (5x - 4)
A. 8x2 - 6 B. 8x C. 2x D. 8x - 6
Find the average value of the function
?
?
over the indicated interval 
.
?
A. 2
B. 
C. 0
Solve the problem.Find the measure of each marked angle.
A. 82° and 82° B. 84° and 6° C. 84° and 96° D. 84° and 84°