Answer:
The money Raven has left after she buys the concert ticket is $8 .
Explanation:
As given
Raven has been babysitting to earn enough money to buy a concert ticket that costs $24.
She already had $12 and she earned $20 babysitting.
Total money Raven have = $12 + $20
= $ 32
Money Raven has left after she buys the concert ticket = Total money Raven have - Cost of the concert ticket .
Money Raven has left after she buys the concert ticket = 32 - 24
Money Raven has left after she buys the concert ticket = $8
Therefore the money Raven has left after she buys the concert ticket is $8 .