Perform the indicated operations.( 7x2y - 2xy2 + 2xy - 5) + ( -3x2y - 8xy2 + 5xy + 8)
A. 5x2y2 - 13
B. 4x2y - 10xy2 + 7xy + 3
C. 10x2y - 9xy2 + 8xy + 13
D. -4x2y + 10xy2 + 7xy + 3
Answer: B
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Write the set in set-builder notation.{12, 15, 18, 21, ..., 42}
A. {x | x is a multiple of 3 greater than 12} B. {x | x is a multiple of 3 between 9 and 45} C. {x | x is a multiple of 3} D. {x | x is a multiple of 3 between 12 and 42}
Use a proportion to solve the problem.According to a recent study, of every 100 people in one American city, 48 are considered overweight. The population of the city is about 1.98 million. How many of these people would be considered overweight?
A. 888,244 people B. 957,813 people C. 95,040 people D. 950,400 people
Solve the problem.The rate of expenditure for maintenance of a particular machine is given by M'(x) = 12x
, where x is time measured in years. Total maintenance costs through the second year are $73. Find the total maintenance function.
A. M(x) = 4(x2 + 5)3/2 - 35 B. M(x) = 12(x2 + 5)3/2 + 61 C. M(x) = 12(x2 + 5)3/2 - 35 D. M(x) = 4(x2 + 5)3/2 + 61
Find the area of the surface obtained by rotating the curve about the -axis. 
What will be an ideal response?