The answer is D i believe
Answer:

Step-by-step explanation:
So, for 60 square feet they charge = 287
So, for 1 square foot they charge = 
If they charge the installation fee this becomes = 
We can write an equation to calculate cost by using this 
Where x is the amount of square foot
Answer:
The answer is F+3
Step-by-step explanation:
Ummmm uh.....fid the perimiter and diamiter and multiply them...
Replace the variables with numbers to find the expression