a scientist has two solutions which she has labeled solution a and solution b. each contains salt. she knows that solution a is 40% salt and solution b is 90% salt. she wants to obtain 30 ounces of a mixture that is 45% salt. How many ounces of each solution would she use

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?