# math

posted by .

At the beginning of the summer molly decided to add a little money into her sayings account every week. After seven weeks her account had \$175. At the end of 15 weeks her account had \$375. Assume that she put the same amount of money into her account every week and will continue to do so.

• math -

Sounds like a good plan.

Was there a question in there somewhere?

• math -

I was trying to find the expression for the problem

• math -

I have to find the equation of the line, but I need the expression to solve it.

• math -

looking at the data, it appears she saved #25 each week. So, after x weeks, her saving y would be

y = 25x

You can work into that by noting that if

y = mx+b

when x=7,
175 = 7m+b

when x=15,
375 = 15m+b

so, 8m = 200
m = 25

Now you have

y = 25x+b
plugging either point shows that b=0, so

y = 25x

• math -

How much was in her account four weeks after she began saving?

• math -

Oops wrong question
I meant to ask
When she started saving money, 203 shopping days were left until Christmas. How much money was in her account at Christmas?

• math -

well, you have the equation. How many weeks from the time she started saving, until Christmas? \$25/week, babe.

I assume you know how many days per week . . .

• math -

Thank you I got it....so helpful

• math -

I have that same question but every time I try to put the expression it says it's wrong can you please tell me the expression you used??

## Similar Questions

1. ### Math

Can you help me with this problem? At the beginning of January, Lisa had some money in her savings account. Each month she was able to deposit enough from her allowance to double the amount currently in the account. However, she had
2. ### algebra

Sarina started depositing money in savings account. after 10 weeks she had \$592. after 18 weeks, she had saved \$968. what is a linear equation that represents the relationship between # of weeks and the amt Sarina saved. Let y= \$ and …
3. ### algebra 2

You have \$22 in your bank account, and you deposit \$11.50 per week. Your cousin has \$218 in his bank account and is withdrawing \$13 per week. The graph of this problem situation intersects at x=8. What does this mean?
4. ### Math

Shannon opens a savings account with \$50. Each week after that she deposits \$8 into her account. How many weeks does it take her to save \$450?
5. ### Math

Monica had a saving a account which paid her an interest rate of 4%. After she had this account for 12 years, she had received \$192 in interest. How much money had she put into the account at the beginning of the 12 years?
6. ### Math

At the beginning of the summer Molly decided to add a little money into her savings account every week. After seven weeks her account had \$175. At the end of 15 weeks her account had \$375. Assumed that she put the same amount of money …
7. ### math

A commuter has 245 in his commuter savings account. This Account changes by 15 dollars each week he buys a ticket. If the account changed by 240 for how many weeks of tickets did the commuter buy. If the commuter wants to buy 20 weeks …
8. ### Math

A commuter has 245 dollars in his commuter savings account. this account changes by -15 dollars each week he buys a ticket. In one time period, the account charged by -240 dollars. For how many weeks did the commuter buy tickets How …
9. ### math

Ed will deposit \$10 every week to his bank account for the next 4 weeks. How much money will ed have in his bank account after 4 weeks?
10. ### Math

Jean has \$280 in her savings account starting next week she will deposit \$30 in her account every week is the amount of money in her account proportional to the number of weeks. Thank you for helping

More Similar Questions