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A(t)=728(1+0.04)^t how much money did aditya originally invest

When using the linear combination metho e linear combination method to solve a system of linear equations, the four options are:

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50. write an inequality to determine the number of chores, c, janie could do to have enough money to buy the cd.