kelly is saving her money to buy a car. She has $250, and she plans to save $75 per week from her job as waitress.

AModel the situation using an arithmetic sequence.

BHow much will kelly have saved after 8 weeks?

CIf the car costs $2000, how long will it take her to save enough money at this rate?

Please someone help me.

Question

30-11-2015
Mathematics

Answered

kelly is saving her money to buy a car. She has $250, and she plans to save $75 per week from her job as waitress.

AModel the situation using an arithmetic sequence.

BHow much will kelly have saved after 8 weeks?

CIf the car costs $2000, how long will it take her to save enough money at this rate?

Please someone help me.

Verified Answer :

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WorldCitizen WorldCitizen · Answer 1 · 2015-12-01T12:28:37-05:00

so she is essentially saving 250+n75, where n is the number of weeks.

after 8 weeks she will have 250+875, (you need to substitute n for the number of weeks, which is 8)

which is
250+600=850

how many more does she need for a car?
she is still missing 2000-850, that is 1150. divide it by 75: it's a little more than 15: so she actually needs to save for 16 weeks after she's been saving for 8, that's a total of 24 weeks.

so in total it will take her 24 weeks (and she will have a little extra).