I'm in a classroom where i'm in 8th grade but mixed with 7th grade. everything else is easy for me but the math and they give me 7th grade stuff? is that bad

The circumference of a circle is 60 pi cm3what is the radius of the circle

If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?