Christine worked 27 hours last month and earned $9 per hour. She spent $15 of her earnings since then. How much money does she have left?

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

The lengths of all sides of a triangle are integers when measured in decimeters. one of the sides has length of 1 dm and another of 3 dm. find the perimeter of the triangle.'

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?