Solve the system by the substitution method.x2 + y2 = 21y2 = 2x + 13
A. (2, 
), (-4, 
), (2, -
), (-4, -
)
B. (2, 
), (-3, 
), (2, -
), (-3, -
)
C. (3, 
), (-4, 
), (3, -
), (-4, -
)
D. (2, 3
), (-4, 3
), (2, -3
), (-4, -3
)
Answer: A
Mathematics
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Construct a table that displays the number of directed paths of length 1 or 2 between each pair of vertices in the following graph. 
A. 
B. 
C. 
D. 
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Evaluate the integral by making a substitution and then using a table of integrals.
A. ln 
- 8 ln 
+ C
B. ln 
+ x - 8 ln 
+ C
C. - 8 ln 
+ C
D. ln 
- 8 ln 
+ C
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Find another name for the given number, but with the denominator indicated.
= 
A. 
B. 
C. 
D. 
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Solve for the indicated variable.A = 
, for B
A. B = 
B. B = ln 
C. B = ln 
D. B = 
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