Answer:
Step-by-step explanation:
Since the two triangles are similar, you can use proportions to solve for the value of 

Now, just multiply 4 and 12.

Then divide that by 3.

Therefore,
.
Answer:
I'm sorry I can help you maybe a little bit if that's okay. Btw what grade are you in?
Step-by-step explanation:
Using pythagorean theorem:
It is definitely a reflection over the horizontal (x) axis, but i think the dilation is by 2
Answer: should be x> -18
Step-by-step explanation: hope this helps