As per linear equation, cost of the project at Mary's property is $1330.
A linear equation represents an equation that has one or multiple variables with the highest power of the variable is 1.
Given, the length of the sidewalk is 200 feet.
Mary's property has 38 feet of front footage.
The proportion of Mary's property as compared to the whole project is
[tex]= \frac{38}{200} \\= 0.19[/tex]
The whole project costs $7000.
Therefore, cost of the project at Mary's property is
= $[tex](7000)(0.19)[/tex]
= $[tex]1330[/tex]
Learn more about a linear equation here: https://brainly.com/question/10876682
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