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Question

# Marsha rode for a while at 20 miles per hour with Bertha and completed the 280 -mile trip by riding with Sherri at 45 miles per hour. If the total trip took 9 hours, how far did she ride with each friend?

Solution

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Step 1
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Data for distance traveled with Bertha:

$\begin{equation*} s=20 \end{equation*}$

$\begin{equation*} t=t_1 \end{equation*}$

Therefore the distance traveled with Bertha is:

$\begin{equation*} d_{1}=20\times t_1=20t_1 \end{equation*}$

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