Solve the system of linear equations.-6x + 9y = 72-3x + 6y = 48
A. (0, 8)
B. No solution
C. (0, 9)
D. (-1, 9)
Answer: A
Mathematics
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Solve.If y varies directly as the square of x, and y = 20 when x = 5, find y when x = 15.
A. 
B. 60
C. 180
D. 
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Find an expression for the nth term of the arithmetic sequence.0.42, 0.44, 0.46, 0.48, 0.5, . . .
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Mathematics
Determine the vertex of the graph of the parabola.y = x2 + 7x + 10
A. 
B. 
C. 
D. 
Mathematics