Mathematics, 04.09.2019 07:20, rylee87

Ralph bought 3 boxes with 20 pencils each and 4 boxes with 10 pens each. to find the total number of pencils and pens, ralph evaluated 3×20+4x10=720. is his answer reasonable? explain.

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Ralph bought 3 boxes with 20 pencils each and 4 boxes with 10 pens each. to find the total number of...