What are the solution(s) to the quadratic equation 9x2 = 4?

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

Solve with work adding cheese to a mcdonalds quarter pounder increases the fat content from 21g to 30g. what is the percent of change ?