1) A store generates Monday through Thursday sales of $150, $125, $75, and $180. What sales on Friday would give a weekday average of$160? 2)A room is 1.5 times as long as it is wide, and its perimeter is p = 30 meters.

I need to write l in terms of w. 

l =

 

 and to make out an equation for the perimeter p in terms of w.

 p =

 

(c) lastly, Find the dimensions of the room. m long x  m wide