Marcus is buying cds. they add up to $31 before tax. the sales tax rate where he lives is 5 percent. how much will his cds cost including tax?

On friday, there were x students at the baseball game. on monday, there were half as many students at the game as there were on friday. on wednesday, there were 32 fewer students at the game as there were on friday. which expression could represent the total number of tickets sold for all 3 games?