Arthur has decided to start saving for a new computer. His money is currently in a piggy bank at home, modeled by the function (x) = 85. He was told that he could do the laundry for the house and
his allowance would be a(x) = 10(x - 1), where x is measured in weeks. Explain to Arthur how he can create a function that combines the two, and describe any simplification that can be done.
PLEASE EXPLAIN!