Giải hệ phương trình sau bằng phương pháp khử Gauss 
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x1 − x2 + x3 − 2x4 = 3
2x1 − x2 − x3 + 2x4 = 2
−x1 + 4x2 − 10x3 − x4 = 6

Find the volume of the solid generated when the region bounded by y= x and y= 4√x is revolved about the x-axis the volume of the solid is: (type an exact answer cubic units)

15 points what is the end behavior of this graph? & what is the asymptote of this graph?

The party planning committee has to determine the number of tables needed for an upcoming event. if a square table can fit 8 people and a round table can fit 6 people, the equation 150 = 8x + 6y represents the number of each type of table needed for 150 people.