Which addition does the model below represent?
A. 3+(-1)
B. 3+4
C. 3+ (-4)
D. 3+1

C. 3+ (-4)

Step-by-step explanation:

First we have three but then we go back 4 spaces which results in -1

The simplified answer of C. would be 3-4= -1

she would want to sell 10 full-year subscriptions and at least 9 half-year subscriptions to get a total of at least $300. 

i hope this answer you! if you have any further questions or concerns, feel free to ask! : )

step-by-step explanation:

mark brainliest!