Explain how multiplying with 6 is like multiplying with 3

Need santino bought a 3/4 pound bag of chocolate chips. he used 2/3 of the bag whule baking. how many pounds of chocolate chips did he use while baking?

Atriangle has sides with lengths of 10 yards, 13 yards, and 18 yards. is it a right triangle?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60