Ascale of a room in a blueprint is 3 in.: 5 ft. a wall in the same blueprint is 18 in. how long is the actual wall? a window in the room has an actual width of 2.5 feet. find the width of the window in the blueprint.

A scale of a room in a blueprint is 3 in.:5 ft. A wall in the same blueprint is 18 in.  How long is the actual wall?  30 feet

A window in the room has an actual width of 2.5 feet. Find the width of the window in the blueprint. 1

to determine the unit cost your would divide the total cost by the number sold.

7 bagels for $4.41       $4.41/7 = $.63 each at fresh side

5 bagels for $3.60         $3.60/5 = $.72 each at value mart

thats not a system of equations, that is a solution