book Maths Puzzle Numerical Ability

I am struggling with this proof, please help!

Prove that the row vectos of an n x n intertible matrix A form a basis for R^n

Thank you!
Glenna

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book Other Question

69,92,64,78,80,82,86,93,75,80,80

what is the maximum,minimun,and range of this data
Isaac left Seattle at 4:45 p.m. and traveled at a rate of forty-six kph less than three times the speed of Natalie, who left at the same time but in the opposite direction. By the