Phoebe can buy 4 songs for $5.04 or 6 songs for $7.56 how much do you think she would pay for 10 songs

Thomas works for a company that occupies a large campus every workday he orders a cup of coffee on campus and the $1.50 cost is automatically deducted from his paycheck. if thomas visits the coffee shop 13 times what will the net change in his paycheck be