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Given a(-12,5) and b(12,29) find the point that divides the line segment ab three-eighths of the way from a to b

Aword processing program requires a 7- digit registration code made up of the digits 1,2,4,5,6,7 and 9 each number has to be used and no number can be used mor than once how many codes are possible

If f(x)=x+7 and g(x)=1/x what is (fog)(x)