an equation is undefined, when its denominator is 0, or turns to 0, because we can't divide anything by 0.
so let's simply set the denominator of this one = 0.
![\bf x^2-7x+10=0\implies (x-2)(x-5)=0\implies x= \begin{cases} 2\\ 5 \end{cases} \\\\[-0.35em] ~\dotfill\\\\ \cfrac{(2)^2-9}{(2)^2-7(2)+10}\implies \cfrac{-5}{-10+10}\implies \cfrac{-5}{0}\leftarrow und efined \\\\\\ \cfrac{(5)^2-9}{(5)^2-7(5)+10}\implies \cfrac{16}{-10+10}\implies \cfrac{16}{0}\leftarrow und efined](https://tex.z-dn.net/?f=%5Cbf%20x%5E2-7x%2B10%3D0%5Cimplies%20%28x-2%29%28x-5%29%3D0%5Cimplies%20x%3D%20%5Cbegin%7Bcases%7D%202%5C%5C%205%20%5Cend%7Bcases%7D%20%5C%5C%5C%5C%5B-0.35em%5D%20~%5Cdotfill%5C%5C%5C%5C%20%5Ccfrac%7B%282%29%5E2-9%7D%7B%282%29%5E2-7%282%29%2B10%7D%5Cimplies%20%5Ccfrac%7B-5%7D%7B-10%2B10%7D%5Cimplies%20%5Ccfrac%7B-5%7D%7B0%7D%5Cleftarrow%20und%20efined%20%5C%5C%5C%5C%5C%5C%20%5Ccfrac%7B%285%29%5E2-9%7D%7B%285%29%5E2-7%285%29%2B10%7D%5Cimplies%20%5Ccfrac%7B16%7D%7B-10%2B10%7D%5Cimplies%20%5Ccfrac%7B16%7D%7B0%7D%5Cleftarrow%20und%20efined)
<h3>
Answer: B. 26</h3>
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Use law of cosines to find angle A
a^2 = b^2 + c^2 - 2*b*c*cos(A)
9^2 = 6^2 + 14^2 - 2*6*14*cos(A)
81 = 36 + 196 - 168*cos(A)
81 = 232 - 168*cos(A)
81 - 232 = -168*cos(A)
-151 = -168*cos(A)
-168*cos(A) = -151
cos(A) = (-151)/(-168)
cos(A) = 0.8988095
A = arccos(0.8988095)
A = 25.9979801
A = 26 degrees approximately
Answer:
There is really no substitute for reading this story. It's a classic, and gives some real insights into a culture where racial prejudice flourished, and how Scout's father stood against it.
Step-by-step explanation:
If you are reading, and have questions about what's going on, or what things mean, please ask.
It is -5, simply divide the number with the variable.
<span>(4*10^2)(2*10^5)
= 8 x 10^7
hope it helps</span>
