Solve by the substitution method.4x + 6y = 02x + 3y = 0
A. {(9, -6)}
B. ?
C. {(9, -5)}
D. {(8, -5)}
Answer: A
Mathematics
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Write the standard form of the equation of the circle with radius r and center (h, k).r = 
; (h, k) = (8, 3)
A. (x - 8)2 + (y - 3)2 = 3 B. (x + 3)2 + (y + 8)2 = 9 C. (x - 3)2 + (y - 8)2 = 9 D. (x + 8)2 + (y + 3)2 = 3
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Rewrite as a complex fraction and simplify.
A. 
B. 
C. 
D. 
Mathematics
Find the indefinite integral.
?
?
A. ?
B. ?
C. ?
D. ?
E. ?
Mathematics
Given matrix A, find the indicated cofactor.Find A21.A = 
A. -1 B. -3 C. 1 D. 3
Mathematics