. Lorenzo bought several pounds of chocolate covered peanuts and gave the cashier a $20 bill. Write an expression for the amount of change he will receive if p represents the cost of the peanuts.
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22. catie is starting a babysitting business. she spent $26 to make signs to advertise. she charges an initial fee of $5 and then $3 for each hour of service. write and solve an inequality to find the number of hours she will have to babysit to make a profit. interpret the solution.!