Answer:
Assessment for Learning (Formative Assessment) The philosophy behind assessment for learning is that assessment and teaching should be integrated into a whole. ...
I think it’s the second one because The formula would be
x=
2a
−b±
b
2
−4ac
Answer:
<h2>X = - 6</h2>
Step-by-step explanation:
<h2>
<u />x + 2 = 1/2x - 1</h2>
![2 + 1 = \frac{1}{2}x - x](https://tex.z-dn.net/?f=2%20%2B%201%20%3D%20%20%5Cfrac%7B1%7D%7B2%7Dx%20-%20x)
![3 = - \frac{1}{2}x](https://tex.z-dn.net/?f=3%20%3D%20%20-%20%20%5Cfrac%7B1%7D%7B2%7Dx)
![x = \frac{ - 3}{ \frac{1}{2} } \\ x = \frac{ - 6}{1} \\ x = - 6](https://tex.z-dn.net/?f=x%20%3D%20%20%20%5Cfrac%7B%20-%203%7D%7B%20%5Cfrac%7B1%7D%7B2%7D%20%7D%20%20%5C%5C%20x%20%3D%20%20%20%5Cfrac%7B%20-%206%7D%7B1%7D%20%20%20%5C%5C%20x%20%3D%20%20-%206)
<em>Hope</em><em> </em><em>this</em><em> </em><em>helps</em><em> </em><em>:</em><em>)</em><em> </em>
For this case what we must observe are the following triangles:
ADB
BDC
According to the diagram, the triangles have exactly the same dimensions.
Therefore, it is fulfilled:
![AB = BC = 6](https://tex.z-dn.net/?f=%20AB%20%3D%20BC%20%3D%206%20%20)
Then, the value of AC is given by:
![AC = AB + BC](https://tex.z-dn.net/?f=%20AC%20%3D%20AB%20%2B%20BC%20%20)
Substituting values we have:
![AC = 6 + 6\\AC = 12 units](https://tex.z-dn.net/?f=%20AC%20%3D%206%20%2B%206%5C%5CAC%20%3D%2012%20units%20%20)
Answer:
The value of AC is given by:
![AC = 12 units](https://tex.z-dn.net/?f=%20AC%20%3D%2012%20units%20%20)
option 3