Sierra and Charlie are paid $12 per hour. However, this week charlie received a 40$ bonus. Given that S and C represent the number of hours worked by Sierra (S) and Charlie (C), which expression can be used to represent their combined earnings for this week?

The combined earnings for Sierra and Charlie can be represented by the expression:

12S + (12C + 40)

To represent Sierra and Charlie's combined earnings for this week, you can use the expression:

12S + 12C + 40

Here, 12S represents Sierra's earnings based on the number of hours she worked (S), 12C represents Charlie's earnings based on the number of hours he worked (C), and the additional 40 represents the bonus Charlie received. Combining these together gives their total earnings for the week.

To represent Sierra and Charlie's combined earnings for the week, we need to calculate their regular earnings plus the bonus.

Since both Sierra and Charlie are paid $12 per hour, Sierra's earnings for the week would be 12*S and Charlie's earnings would be 12*C.

The bonus that Charlie received is $40, so we need to add this amount to Charlie's earnings.

Therefore, the expression to represent their combined earnings for the week would be:
12*S + 12*C + 40.