Find the domain of the rational expression. 
A. {x|x is a real number and x ? 8}
B. {x|x is a real number and x ? 8 and x ? 1}
C. {x|x is a real number}
D. {x|x is a real number and x ? -8}
Answer: A
Mathematics
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A. 13.3, -31.3 B. -31.3, 13.3 C. -13.3, 31.3 D. 31.3, -13.3
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Solve.4x2 - 28 = 0
A. -
, 
B. ±7
C. 8
D. 14
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Graph the function.f(x) = -5 
A. 
B. 
C. 
D. 
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Solve the problem.A twin-engined aircraft can fly 672 miles from city A to city B in 3 hours with the wind and make the return trip in 7 hours against the wind. What is the speed of the wind?
A. 96 mph B. 80 mph C. 64 mph D. 48 mph
Mathematics