if the units of measurement are in feet, how much square footage would you have in the dinning room if x=5ft? does this answer seem reasonable

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

What is always true when two whole numbers are subtracted?