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Describe the possible echelon forms of the standard matrix for a linear transformation t where t: set of real numbers is onto.

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

How many different three-digit numbers can be formed using the digits 1 comma 2 comma 9 comma 6 comma 4 comma 3 comma and 8 without repetition? for example, 664 is not allowed.