Asparkling distributor wants to make up 300 gallons of sparkling water to sell for $6.00 per gallon. she wishes to mix three grades of water selling for $9.00, $3.00, and $4.50 per gallon, respectively. she must use twice as much of the $4.50 water as the $3.00, water. how many gallons of each should she use?

Amira is painting a rectangular banner 2 1/4 yards wide. the banner will have a blue background. amira has enough paint to cover 1 1/2 square yards of the wall. the school colors are blue and yellow, so amira wants to add yellow rectangles on the left and right sides of the blue rectangle. the yellow rectangles will each be 3/4 yards wide and the same height as the blue rectangle. what will be the total area of the two yellow rectangles?