Answer:

Step-by-step explanation:
<u>First, find the equation of the line</u>.
<em>Slope-intercept form</em> of a linear equation: 
(where m is the slope and b is the y-intercept)
From inspection of the graph, the y-intercept is at (0, -4)
Therefore, b = -4
Choose another point on the line, e.g. (7, 0)
Now use the slope formula to find the slope:

where:

Therefore, the equation of the line is:

For an inequality, the dashed line means < or > (whereas a solid line means ≤ or ≥)
As the shading is below the line, we need to use <
Therefore, the final inequality is:

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Below are the answers:
<span>When (1, 2) is substituted into the first equation, the equation is false.
</span><span>
The ordered pair (1, 2) is not a solution to the system of linear equations.
The ordered pair (1, 2) is a solution to the system of linear equations.</span>
Answer:
y = 48, x = 11
Step-by-step explanation:
6x = 3x + 33
3x = 33
x = 11
6x + 3x + 33 + y = 180
66 + 33 + 33 + y = 180
66 + 66 + y = 180
132 + y = 180
y = 180 - 132
y = 48