What is the value of each expression if you substitute 7 in for b 8b+18 and 2(4b+9)

You are at a restaurant and owe $38 for your meal. you want to leave a 20% tip. how much will your tip be?

You and a friend went to the movies.you spent half your money on tickets. then you spent 1/4 of the money on popcorn, $2 on candy, and $3 on a soda. if you have $1 left, hiw much money did u take to the movies?

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