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Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

Sara made $253 for 11 hours of work. at the same rate how much would he make for 7 hours of work?

Henry's butcher shop uses an electronic scale that measures to 1/100 of a pound. which is the most accurate measurement based on the limitations of the scale that might be found on a package of meat sold by henry?