SOLUTION:
PART ONE:
Step 1:
The equation to find the total money in the savings account will be:
[tex]S\text{ = 550 + 70 W}[/tex][tex]where\text{ S = the total amount of money in the savings account \lparen in dollars\rparen}[/tex][tex]where\text{ W = number of weeks Elsa has been adding money}[/tex]PART TWO:
[tex]\begin{gathered} Given\text{ that:} \\ S\text{ = 550 + 70 W} \\ when\text{ W = 11,we have that:} \\ S\text{ = 550 + 70\lparen 11 \rparen} \\ S\text{ = 550 + 770} \\ \text{S = 1320} \\ S\text{ = \$ 1320} \end{gathered}[/tex]The total amount of money after 11 weeks = $ 1320