If the domain and range have the same number is it still a function??

"princess tower" in dubai is considered the world's tallest residential building, towering to 1 0 1 101 floors! t ( n ) t(n) models the number of tenants living on floor n n of the tower. what does the statement t ( 2 0 ) = t ( c ) t(20)=t(c) mean?

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !