In this lesson, we learn how to solve a word problem involving the rate of a current and rowing in still water using two variables and two linear equations. We are given the distance and time traveled by a dolphin both with and against the current and are tasked with finding the rate of the dolphin in still water and the rate of the current. By setting up a chart and using the formula rate times time equals distance, we can write two equations and solve for both variables, with the final answer being the rate of the dolphin in still water is 35 miles per hour and the rate of the current is 5 miles per hour.
Shows how to solve a word problem involving the rate of a current and rowing in still water using 2 variables and 2 linear equations.
More free YouTube videos by Julie Harland are organized at http://yourmathgal.com