Answer:
the three red tiles in the model represents -3x
Step-by-step explanation:
From the given diagram, the three red tiles have -x, -x and -x
To find what 3 red tiles represents , we need to add all the three red tiles
Red tiles represents -x + -x + -x
Combine all the terms to add it
All terms are like terms. -x means -1x
[tex]-1x+(-1x_+(-1x) = -1x-1x-1x= -3x[/tex]
So , the three red tiles in the model represents -3x
