The principal buys 42 red cups and 21 blue cups. she puts 7 cups on each table. how many tables will have cups?

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

Out of $20$ creepy-crawly creatures in a room, $80\%$ are flies and $20\%$ are spiders. if $s\%$ of the total legs belong to spiders, what is $s$?

Val and tony get paid per project. val is paid a project fee of $44 plus $12 per hour. tony is paid a project fee of $35 plus $15 per hour. write an expression to represent how much a company will pay to hire both to work the same number of hours on a project.