Question

Christine is putting money into a savings account. She starts with $550 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 Christine 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 19 weeks.

Answer 1

Hi!

Let's write the equation.

550 + 60w = s

Now put in our value for w.

550 + 60 · 19 = 1690

The answers are
550 + 60w = s
And
1690

Hope this helps! :)

Answer 2

60w+550=s

You have to multiply the amount of money she gets each week by the number of weeks to get the total amount saved. You also have to incorporate the starting amount of $550 so you have to add that to whatever Christine has saved. 
To find the amount in her savings account after 19 weeks you just have to substitute 19 for w and solve it.

60*19+550=s
Multiply first
1140+550=s
and your answer is:
$1,690=s