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Caroline starts with $20 in her piggy bank. Each week she adds $4 to the piggy bank. After how many weeks will Caroline have more than $100 in her bank?

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first I calculate in how many weeks Caroline will get 80$
4$*20 weeks =80$
but Caroline had 20$ at the beginning which means in 20 weeks she will have collected 80$+ 20$= 100$
the answer is after 20 weeks Caroline will have more than 100$in her bank .
User LostAtSeaJoshua
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6 votes

Answer:

Caroline will need atleast 21 weeks to get a balance more than $100, or any number greater than 20 weeks.

Explanation:

Caroline starts with $20 in her piggy bank. Each week she adds $4 to the piggy bank.

Let the number of weeks she adds $4 to make more than $100, be x.

Equation forms:


20+4x>100

Solving for x;


4x>100-20

=>
4x>80

Dividing by 4 on both sides;

x > 20.

This means that Caroline will need atleast 21 weeks to get a balance more than $100, or any number greater than 20 weeks.

User Nitzien
by
8.1k points

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