Question

Medal
You had a credit card balance of $378 before you used the card to purchase books for $160, CDs for $22, and a pair of shoes for $58. You then make a payment to the credit card company of $378. Find your updated balance after the payment is processed.
$ ?

Answer 1

What is 160+22+58?

Answer 2

240

Answer 3

Okay so what is 378-240?

Answer 4

138

Answer 5

Okay now 138+378?

Answer 6

516

Answer 7

Updated Balance = (Previous Balance) + (Purchases) - (Payments)

Answer 8

Good! :)

Answer 9

so the answer is $516

Answer 10

Wait @DanJS....wouldn't it be -purchases because that is spending money?

Answer 11

The balance was $378 and a payment of $378 was made, so the new balance is zero before the new charges.
Now just add the three new charges.
That is the new balance.

Answer 12

No , purchases add to your balance that you owe, payments subtract from your debt

Answer 13

oh!

Answer 14

The new balance is: $160 + $22 + $58

Answer 15

Updated Balance = (Previous Balance) + (Purchases) - (Payments)
= 378 + (160+22+58) - 378
= what @mathstudent55 said

Answer 16

\(= \color{red}{\cancel{378}} + (160+22+58) - \color{red}{\cancel{378}}\)
The two amounts in red cancel each other leaving only the new charges.

Answer 17

240