Answer: 
Step-by-step explanation:
Given, the length of the rectangular dog run is 18 feet.
Formula: Perimeter = 2 ( length + width)
Let width be x.
Then, Perimeter = 2 (18 + x ) feet
The perimeter of the dog run must be at least 42 feet and no more than 72 feet.
That is

Divide inequality by 2, we get

Subtract 18 from each side, we get

Required inequality : 
See attachment for the graph of y = 2x - 1
<h3>How to graph the function?</h3>
The equation of the function is given as:
4x + y = 6x - 1
Subtract 4x from both sides of the equation
y = 2x - 1
This means that the equivalent equation of 4x + y = 6x - 1 is y = 2x - 1
So, we plot the graph of y = 2x - 1 to represent the equation 4x + y = 6x - 1
See attachment for the graph of y = 2x - 1
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Answer:
16
Step-by-step explanation:
Substitute 3 for n,
6(3) - 2
then multiply
18 - 2
then subtract
16