Plz help me I need help with math plz anyone who good at math

Select all of the quadrants that the parabola whose equation is y=√x-4 (principal square root) occupies. i ii iii iv

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Some boys and girls were asked if they had a pet. one third of the group were boys. there were 20 boys. 20% of the girls had a pet. boys with a pet : girls with a pet = 1 : 5 i need to know how many girls there are.