Mathematics, 17.07.2019 07:30 laurabwhiddon

Keiko has scored 86, 91, 86, 61, and 87 on her previous five tests. what score does she need on her next test so that her average (mean) is 84?

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Keiko has scored 86, 91, 86, 61, and 87 on her previous five tests. what score does she need on her...