COLLEGE Troy’s grandfather gave him $700 to start his college savings account. Troy’s grandfather also gives him $40 each month to add to the account. Troy’s mother gives him $50 each month but has been doing so for 4 fewer months than Troy’s grandfather. Write a simplified expression for the amount of money Troy has received from his grandfather and mother after m months.

Simplified expression for the amount is 10(9m + 50)

Step-by-step explanation:

If the total months that Troy's grandfather has given him money is m, then the number of months that Troy's mother has given him money is m - 4.

⇒ Total amount in account = 700 + 40m + 50(m - 4)

                                             = 700 + 40m + 50m - 200

                                             = 90m + 500 = 10(9m + 50)

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