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Answer:

Step-by-step explanation:
Given


Solving (a): Graph the equations
See attachment for graph
Solving (b): The solution
This is the point of intersection between both lines
From the attached graph, the point of intersection is:

Just multiply the value of Yards by 3, you'll get the answer in feet
As 1 yard = 3 foot
Hope this helps!
Use tI 84 calculator .
go to y= and then plug the equation in the side then you will find the answer