What is 2ab if a=2 and b=-3

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?

If jaime wants to find 60% of 320, which table should he use?

At 6 1/2 cents per pound of string beans how much does 7 pounds cost