For what values of b will f(x) = logh x be an increasing function?

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

Having a hard time understanding this question (see attachment).

Francis is getting new carpet tiles in his living room and den. his living room and den are connected. he needs to figure out how much carpet he needs and the cost involved. if each tile costs $2.00 per sq ft, how much would it cost to have new tile put in the den? a) $24 b) $36 c) $48 d) $54 plz awnser soon