Five friends split the cost of parking at an amusement park. Each of them also buys a$30 ticket. write an algebraic expression that represents the amount of money each friend spends. identify any variables

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?

What is the number 321,000,000 in scientific notation? also what is the number? ?

Ammonia molecules have three hydrogen atoms and one nitrogen atom.how many of each atom arein five molecules of ammonia