1. Create a proportion: 12/17=18/x 12x=306 x= $25.50 2. Let Casey’s age be c and his sister’s be s c=2s-3 c=s+5 2s-3=s+5 s=8 c=13 Casey is 13 years old!
1. Weight of potatoes........Cost 12 lb ................................. $17 18 lb ................................. X by cross multiplication we get 12 X = 17 × 18 12 X = 306 X = 306/12 X = $ 25.5
