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Whitepunk [10]
3 years ago
14

What is BE ? Please explain it in full dont just give me an answer

Mathematics
1 answer:
posledela3 years ago
5 0
There are two methods to solve this problem. One of them is the typical method and the other one is the short-cut. I will explain the shortcut

Short-cut: 
This method is quick and easy, and works with ALL triangles, which is why I suggest you use this. You make proportions. Since the triangles are similar, we can use CPCTC. Thereafter,
\frac{AD}{CE}= \frac{DB}{EB}

Now, you just need to identify the terms, substitute, and solve for the unknown, which would be k. 

\frac{12}{3} = \frac{k+5}{k-7} \\ 12(k-7)=3(k+5) \\ 12k-84=3k+15 \\ 9k=84+15 \\ 9k=99 \\ k=11[/tex]

So we found k, but it is asking for BE. Therefore, plug in the value of k, which is 11, into the expression for BE, which is k-7.

BE=K-7
k=11
BE=11-7
BE=4

Your answer is 4.





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Hello!

<u>Number 22</u>: We'd plot the first point at 0 since there is no stated y-intercept. Next, we'd use our slope to determine where to plot the next point, and that would create our line. According to the problem, our slope is -\frac{1}{2}, which automatically tells us that the slope would be going downwards because it's negative. 

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-2x + 3y = 6&#10;&#10;-2x + 2x + 3y = 6 + 2x&#10;&#10;3y = 6 + 2x&#10;&#10;3y/3y = 6/3y + 2x/3y&#10;&#10;y = 2 + 2/3x

Flip some of those numbers around to get our equation in slope-intercept form:

y =  \frac{2}{3}x  + 2

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Your points should be at (0, 2) and (4, 3)
8 0
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