I ready classroom grade 8 volume 1 mathematics

Can anyone help me with this asap !!!

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Louis wants to carpet the rectangular floor of his basement.the basement has an area of 864 square feet.the width of the basement is 2/3 it's length. what is the length of louis's basement

Elizabeth claims that the fourth root of 2 can be expressed as 2^m since (2^m)^n = 2. find the values of m and n for the case where elizabeth's claim is true.