i need help im really confused with this if your explanation is good then ill give brainiest and 5 stars

Explanation:

Focus on the x terms for now. We have 10x and 2x. Saying 10x+2x is like saying "10 boxes +  2 boxes = 12 boxes". We can replace "boxes" with "x" to say 10x+2x = 12x

The y terms are a similar story, and -5y-3y = -8y. It might help to set up a number line to see why -5-3 turns into -8.

12x - 8y

Step-by-step explanation:

=> 10x - 5y + 2x - 3y

=> (10x + 2x) + (-5y - 3y)

=> 12x + (-8y)

=> 12x - 8y

answer: c

because if you look at the chart you can see a pattern and compare it to the question he simplify out your

but i think the formula is f(x)=6x