Hey there! So because this is to many question rolled in one, Im only going to be answering your simplify questions.
Starting with
1:
2:
3:
4:
So i solved this by using our square root functions. For if you didn't know, the square root symbol is this: √
Hope this helps!
Answer:
the first multiple choice {x|1≤x<5}
The area is 30 ! The base is 12 & height is 5 so area = 30 . Hope This helps !