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Mathematics 7 Online
OpenStudy (anonymous):

ashley left the science museum and drove toward the lake at an average speed of 30 mph. DeShawn left two hours later and drove in the opposite direction with an average speed of 50 mph. Find the number of hours DeShawn needs to drive before they are 380 mi. apart.

OpenStudy (anonymous):

help please @mathmale @dan815

OpenStudy (mathstudent55):

|dw:1453157452952:dw|

OpenStudy (mathstudent55):

speed = distance/time distance = speed * time

OpenStudy (mathstudent55):

|dw:1453157586750:dw|

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