4/7 for the 1st one., 8/9 for he 3rd dunno about middle one soz
Mental way:
415 / 51.9 * 100 = 800 students in the school.
detailed way:
x is the amount of students in the school.
51.9% * x = 415
(divide both sides by 51.9% (or 0.519))
x = 800 students
The answer to this question is x=E
Ummm I think the first option would work. An by the way congrats when you graduate :)
There may be a relationship between 'x' and 'y', but we have no equation
that shows what it is. So we don't have the information we need to answer
the question.
