Write the sum using summation notation.0 + 2 + 6 + 12 + 20
A. 
B. 
C. 
D. 
Answer: A
Mathematics
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Use the substitution formula to evaluate the integral.
A. 
B. 18
C. 
D. 6
Mathematics
Solve the problem.A twin-engined aircraft can fly 960 miles from city A to city B in 4 hours with the wind and make the return trip in 6 hours against the wind. What is the speed of the wind?
A. 20 mph B. 80 mph C. 40 mph D. 60 mph
Mathematics
Solve the system of equations using substitution.
A. x = -8, y = -7; x = -7, y = -8 or (-8, -7), (-7, -8) B. x = 8, y = 7; x = 7, y = 8 or (8, 7), (7, 8) C. x = -8, y = 7; x = -7, y = 8 or (-8, 7), (-7, 8) D. x = 8, y = -7; x = 7, y = -8 or (8, -7), (7, -8)
Mathematics
Solve the inequality.x4 < 49x2
A. (-?, -7) or (0, 7) B. (-7, 0) or (7, ?) C. (-?, -7) or (7, ?) D. (-7, 0) or (0, 7)
Mathematics