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Use Gaussian elimination to solve. The Burkes pay their babysitter$5 per hour before 11 P.M. and$7.50 after 11 P.M. One evening they went out for

Use Gaussian elimination to solve.

The Burkes pay their babysitter$5 per hour before 11 P.M. and$7.50 after 11 P.M. One evening they went out for 6 hrs. and paid the sitter $40.00. What time did they comehome?

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