Solve the system.x2 + y2 = 13x - y = 1
A. {(2, 3), (3, 2)}
B. {(-2, 3), (-3, 2)}
C. {(2, -3), (3, -2)}
D. {(-2, -3), (3, 2)}
Answer: D
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A.
?
B.
?A A
C.
?
D.
?a and c only.
E.
?a and b only.
Use the statistical display to answer the question.The midterm test scores for the seventh-period typing class are shown below on a dot plot. 
What is the most frequent score?
A. 98 B. 56 C. 83 D. 89
Find the domain of the function.
Which of the following mathematical equations is used to calculate the degree of operating leverage (DOL)? (? = change)
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