Yes it is a function!, all the first numbers are none repeating, for example it says -5,4,6 since they are not the same this is a function
A. a + ( - a)
Because it’s the same thing as: a - a
And if you plug in any value for example:
2 - 2 that would be 0
You can think of this equation as

and thus apply the transformations to it as such



1) D = 2, C = +3
2) D = -12, C = -2
3) C = +6, D = 3
4) C = -7, D = -7
Answer:
7/9
Step-by-step explanation:
I think this is right : 56/72 gets simplified to 7/9