Groceries was 11.20 befor sales tax. how much was the total cost for groceries after the 5% sales tax was charged

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?

Find the maximum value of p= 4x + 5y subject to the following constraints :

Eden has a part time job. she is paid ? 7.20 an hour the week she worked 18 and a half hours how much is she paid