What is the area for this? (number 6 so pardon what is on the bottom)

What are the sotions to the quadratic equation 9x^2=4

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.

Which table shows a proportional relationship between miles traveled and gas used?