Mai is putting money into a savings account. She starts with $750 in the savings account, and each week she adds $60 . Let S represent the total amount of money in the savings account (in dollars), and let W represent the number of weeks Mai has been adding money. Write an equation relating S to W . Then use this equation to find the total amount of money in the savings account after 12 weeks.
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Alright, the best way to approach this question is by building our equation piece by piece!
Initially we're told that she starts with $750. So immediately we can say that
Then we're told that each week she saves $60, which means she adds $60 after every week. So after one week, she saved $60, after two weeks, she added $120, after three, $180! Therefore, we can model our equation as:\[\huge S=750+60w\]Where w=number of weeks!
b). Now all you have to do is plug in 12 for w!