Rachel earns $6.25 each week for doing chores. Bob earns $5.50 each week for doing chores. After 13 weeks, how much more will Rachel earn than Bob for doing chores?
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Aschool puts on a play. the play costs $1,200 in expenses. the students charge $4.00 for tickets. there will be one performance of the play in an auditorium that seats 500 people. what is the domain of the function that shows the profit as a function of the number of tickets sold?  

How much dextrose 70% must be mixed with dextrose 5% to prepare 1,000 ml of dextrose 20%?

Which number line represents the solution set for the inequality -1/2x> 24?