Given two terms a, b.
Sum of terms = a+b
Difference of terms = a-b
Product of sum and difference (do not forget parentheses)
=(a+b)(a-b)
which can be expanded as=a^2-b^2
We can make use of this property to calculate with lightning speed, assuming you know the squares of numbers.
For example,
8*6=(7+1)(7-1)=7^2-1^2=48
9*7=(8+1(8-1)=8^2-1^2=64-1=63
5*15 = (10+5)(10-5)=10^2-5^2=75
22*18=(20+2)(20-2)=20^2-2^2=400-4=396
63*57=(60+3)(60-3)=60^2-3^2=3600-9=3591
128*112=(120+8)(120-8)=120^2-8^2=14400-64=14336
We can go on and on!
135 + (-136) = 135 - 136
= -1
126 + (-747) = -621
-1 - (-621) = -1 + 621 = 620
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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:

Z = 106
x = 32
Z
180 - 74 because SSI
X
Set Z equal to equation because Alt. Int. Angles
Answers are
Angle X is the largest
XZ is the shortest side
Angle Z is greater than angle Y