Abox of 10 envelops for $.83 or a box of 12 evelopes for $1.13^also how did you figure it out

Quadrilateral wxyz is on a coordinate plane. segment yz is on the line x+y=7 and segment xw is on the line x+y=3. which statement proves how segments yz and xw are related

Julia bought 7 hats a week later half of all her hats were destroyed in a fire. there are now only 12 hats left with how many did she start

The side of a square is 3 and 5/2 inches