Mathematics, 01.12.2020 19:50 tre9990

Jolynn drove 370 miles in 6 hours. she drove 70 miles per hour on the highway and 45 miles per hour on the back roads. how many hours did she spend on the backroads? please help, its on system of equations and this is due in less then 4 hours.

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Jolynn drove 370 miles in 6 hours. she drove 70 miles per hour on the highway and 45 miles per hour...