Here is your answer:

The 'I' around the 21 means to change positive but since how the negative since is out of the 'I' it doesn't change into a positive it's still a negative just without the 'I'.
Therefore the answer is "-21."
Hope this helps!
this would be as simple as 6c
6c is the answer to this problem unless you have a value for the variable
hope this helps you out! good luck!
namely, how many times does 2/7 go into 7/8?

Answer:
1) 1/3
2) 4:1
Step-by-step explanation:
An Independent variable can change the dependent variable because the independent variable can be changed alone while a dependent variable can also be changed by another variable.
correct me if I am wrong.