Answer:
The scale factor is 1/2
Step-by-step explanation:
we know that
A dilation is a non rigid transformation that produces similar figures
If two figures are similar, then the ratio of its areas is equal to the scale factor squared
Let
z ---> the scale factor
x ---> the area after dilation
y ---> the original area
![z^2=\frac{x}{y}](https://tex.z-dn.net/?f=z%5E2%3D%5Cfrac%7Bx%7D%7By%7D)
we have
![x=25\ cm^2\\y=100\ cm^2](https://tex.z-dn.net/?f=x%3D25%5C%20cm%5E2%5C%5Cy%3D100%5C%20cm%5E2)
substitute
![z^2=\frac{25}{100}](https://tex.z-dn.net/?f=z%5E2%3D%5Cfrac%7B25%7D%7B100%7D)
![z^2=\frac{1}{4}](https://tex.z-dn.net/?f=z%5E2%3D%5Cfrac%7B1%7D%7B4%7D)
![z=\frac{1}{2}](https://tex.z-dn.net/?f=z%3D%5Cfrac%7B1%7D%7B2%7D)
Answer:
You done it right
Step-by-step explanation:
Well if X is < (greater than) -7 it must be 0 because if -15, -10, -7, -7.2, are all less than -7 then 0 is the best answer
Pretty sure the correct answer is 19 :))