Determine the x and y intercepts of the polynomial functions.

1. y= (x+1) (x-2) (x+9)
2. y= -3x (x² -x -6)
3. y= 2x³+3x² -17x+12

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Rod got 96,93,94,88,90 and 91 on six arithmetic tests. what was his average score?

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