If each xi is either 0 or 1, determine the number of vectors such that their sum x1 + x2 + . . . + xn is odd.

If each xi is either 0 or 1, determine the number of vectors such that their sum x1 + x2 + . . . + xn is odd.

we are suppose to use dimensional analysis

please help with this math problem.

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(15, 21), (12, y), slope = 6

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y=-40t2+225t

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-9/7x -5y=2

What is the balance?

I get √x^2+y^2 >= x+y but what after that?