Angles ECD and CEF add to 180
40+140 = 180
So that means we have EF parallel to CD (due to the same side interior angle theorem)
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Angles BCE and ECD combine to 30+40 = 70, which is congruent to angle ABC = 70 as well.
In other words, this shows angle ABC = angle BCD. Both of these angles are alternate interior angles. Since they're congruent, they lead to AB being parallel to CD.
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So far we have
AB || CD
CD || EF
Using the transitive property, we can then link the two statements to say AB || EF. Think of a chain where CD is the common link. We go from AB to CD, then from CD to EF. So we can just take a single path from AB to EF.
It's like saying "P --> Q and Q --> R, therefore P --> R"
Answer:
Explanation:
The given function is:
To reflect across the x-axis:
y = -1
![\begin{gathered} f^{\prime}(x)=-[-(x-4)^4+1] \\ \\ f^{\prime}(x)=(x-4)^4-4 \end{gathered}](https://tex.z-dn.net/?f=%5Cbegin%7Bgathered%7D%20f%5E%7B%5Cprime%7D%28x%29%3D-%5B-%28x-4%29%5E4%2B1%5D%20%5C%5C%20%20%5C%5C%20f%5E%7B%5Cprime%7D%28x%29%3D%28x-4%29%5E4-4%20%5Cend%7Bgathered%7D)
Translate by 4 units left, you add 4 to x
60 minutes just find a number that is equivalent to both
