Solve using the substitution method. Use a graphing calculator to check your answer. x + 4y = 0x - 4y = 24
A. (12, 3)
B. (4, -1)
C. (-3, 12)
D. (12, -3)
Answer: D
Mathematics
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For an arc length s, area of sector A, and a central angle ? of a circle of radius r, find the indicated quantity.r = 81.6 cm, ? = 
radians, find A
A. 1310 cm2 B. 16.1 cm2 C. 2620 cm2 D. 417 cm2
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Provide an appropriate response. Solve the given problem, using decimal equations:If you drove 487 miles at 60 miles per hour, how long did your trip take?
A. 0.12 hours B. 5.53 hours C. 427 hours D. 8.12 hours
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Find parametric equations to represent the line segment from (-3,4)to(12,-8).
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Mathematics