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11 January, 20:20

Jill mowed lawns for 3 hours and earned $7.20 per hour. Then she washed windows for 4 hours and earned $6.75 per hour. what were jill's average earnings per hour for all 6 hours?

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  1. 12 January, 00:16
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    Actually, she worked for seven hours, so I'll solve for that.

    7.20 x 3 = 21.6

    6.75 x 4 = 27

    21.6 + 27 = 48.6

    48.6 / 2 = 24.3

    Her average should be $24.3 If she did work six hours, just multiply 6.75 x 3 and do what I did.
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