Answer:
B. -21a-15
Step-by-step Explanation:

The total number of cookies baked by grandma = 96
Number of grandchildren = 8
As given, all cookies were evenly divided among 8 children, let us assume that everyone except Cindy got equal share. So on being divided equally, it becomes,
cookies per children.
But, as mentioned that Cindy received 'c' cookies less, so let us suppose Cindy received 'x' cookies.
Expression becomes: 
Hence, Cindy received 12-c cookies.
Yes they are proportionate
Answer:
2,225
Step-by-step explanation:
You have to imagine it as a number line, with Christs death for 0. 582 years in the other direction, towards the positives, gives you 582. Plus the 1,643 years, and you have to solve 582 + 1,643