Answer:
40
Step-by-step explanation:
Use the Outside Angles Theorem,

Answer:
length of each side : 10 cm
Step-by-step explanation:
all sides of squares are equal
thus, 4 sides = 40 cm
1 side = 40/10 cm
1 side = 10 cm
Answer:
Solve the system of equations by graphing, elimination or
subod
Step-by-step explanation:
Line 1 and Line 4 are parallel lines
Solution:
General equation of a line:
y = mx + c
where m is the slope and c is the y-intercept of the line.
<u>To find the slope of each line:</u>
Line 1: 
Slope 
Line 2: 

Add 7 on both sides, we get

Slope 
Line 3: 
Slope 
Line 4: 
Subtract x from both sides, we get

Multiply by
on both sides, we get

Slope 
<em>Two lines are parallel, if their slopes are equal.</em>
From the above slopes,

Therefore Line 1 and Line 4 are parallel lines.
9514 1404 393
Answer:
-2/3
Step-by-step explanation:
The slope formula is useful for this.
m = (y2 -y1)/(x2 -x1)
m = (2 -(-6))/(-9 -3) = 8/-12
m = -2/3
The slope of the line is -2/3.
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The graph shows the two points and a line with a slope of -2/3.