Question

Carrie withdraws $10 from her account each day for 7 days.Each of those days, she also deposited $4. show two different ways to calculate the integer that represents the total change in her account balance

Answer 1

Fisrt Way

Since Carrie withdraws $10 each day for 7 days, this means that she withdraws a total of

`7\cdot10=70`

so she witdraws $70.

Now we know that each of those days she also deposited $4, the she deposited a total of $28.

The total change in her account in this 7 days woule be $28-$70=-$42.

Second way

Another way to calculate the total change would be like this:

She withdraws $10 dollars each day but she also deposits $4 each day, this means that the change in her account each day will be $4-$10=-$6.

Now, since we know that she did this every day for 7 days the total change in her account would be (7)($-6)=-$42.