Solve the system by elimination.-2x + 6y = 2-6x + 18y = -6
A. {(4, -12)}
B. {(-4, 12)}
C. {(x, y)|-2x + 6y = 2}
D. ?
Answer: D
Mathematics
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Use a sum or difference identity to find the exact value.
A. 
B. 2
C. 
D. 
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A mold culture in a dorm refrigerator is circular and growing. The radius is increasing at a rate of 0.1 cm/day. How fast is the area growing when the culture is 6 centimeters in radius? (The area of a disc of radius r is 
.)
?
A. 
B. ?
C. ?
D. 
E. 
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Factor. If a polynomial is prime, state this.y2 + 12y + 35
A. (y + 35)(y + 1) B. (y - 7)(y + 5) C. (y + 7)(y + 5) D. (y - 7)(y - 5)
Mathematics