bridget101
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please help!!!! again

1) A friend is training for a marathon.She can run 4 miles in 28 minutes.Assume that she runs at a constant rate. Write an equation to represent,y,your friend can run in x minutes.
Please help show ALL work

Sagot :

[tex]\frac{y\ miles}{x\ minutes}=\frac{4\ miles}{28\ minutes}\ \ |cross\ multiply\\\\28y=4x\ \ \ \ |divide\ both\ sides\ by\ 28\\\\\boxed{y=\frac{4}{28}x\Rightarrow y=\frac{1}{7}x}[/tex]
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