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Back to 4.2 Solve Applications with Systems of Equations

4.2 Exercise 27

Avg difficulty 2.5

Translate to a system of equations and then solve:

Charlie left his mother’s house traveling at an average speed of 36 miles per hour. His sister Sally left 15 minutes (14hour)\left(\frac{1}{4} \text{hour}\right) later traveling the same route at an average speed of 42 miles per hour. How long before Sally catches up to Charlie?

OpenStax Intermediate Algebra 2e, 4.2 Solve Applications with Systems of Equations, exercise 27

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Adapted from Intermediate Algebra 2e © 2020 Rice University. Licensed under CC BY 4.0. Source: Intermediate Algebra 2e. Imported at revision 77a933c.