Which sum or difference is modeled by the algebra tiles?

(C)

Step-by-step explanation:

The expression represented by the upper tiles is:

The expression represented by the lower tiles is:

Adding the two

Writing it as a difference, we have:

The correct option is C.

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80

your question is incomplete, write all the numbers in the sequence that it tells you.  

step-by-step explanation: