Annabelle bought three rings that each cost $7. If she paid for the rings with $40, how much change should she receive? A. $21
B. $33
C. $29
D. $19
Show work.
TRYING TO PROVE MY 3RD GRADE SISTER WRONG. She swore it was 21.

What are the domain and range of f(x)=[1/5]x

How do i do this activity, is appreciated

1. if we have 3 babies what is the probability they’re going to be all boys? 2. if we roll 2 die at the same time what is the probability of getting less than 10 on the first roll and a 5 on the second roll 3. if we have 3 babies what is the probability their is going to be 2 girls? 4. if we have 3 babies what is the probability of having no more than 1 girl? 5. it we have 3 babies and then have another 3 babies what is the probability of us having at least 1 boy and then having all girls?