Math Problem Statement
It took Terry 7 h to drive 390 km from Cold Bay to Morgan's Cove. He averaged 60 km/h for the first part of the trip, but was forced to complete the trip at 50 km/h due to a thunderstorm. How many hours did he spend driving at 50 km/h? How is the answer 3 hours?
Solution
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Math Problem Analysis
Mathematical Concepts
Algebra
Linear Equations
Distance-Speed-Time Relationship
Formulas
t_1 + t_2 = Total Time
Distance = Speed × Time
60t_1 + 50t_2 = Total Distance
Theorems
Linear System of Equations
Suitable Grade Level
Grades 8-10
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