A driver calculates that if she decreases her average speed by $15 \mathrm{mi} . / \mathrm{h}$, she would travel her 650 -mile trip in $3.0 \mathrm{hr}$ more time than at her usual speed. What is her usual speed?

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The Answer of A driver calculates that if she decreases her average speed by $15 \mathrm{mi} . / \mathrm{h}$, she would travel her 650 -mile trip in $3.0 \mathrm{hr}$ more time than at her usual speed. What is her usual speed?

A Driver Calculates That If She Decreases Her Average Speed 15mi./h15 \mathrm{mi} . / \mathrm{h}15mi./h

A Driver Calculates That If She Decreases Her Average Speed $15 \mathrm{mi} . / \mathrm{h}$