A baker has 6 pounds of sugar. She divides them equally into 4 containers. She then uses 1 container to bake pies. Which expression shows how many pounds of sugar the baker used?

If i think this is what your asking, he should look at the grams or pounds/ounces and compare the to their cost then max can identify which one is proportional and which is not ( i think xd)

The skating rink rented 872 pairs of skates during april and may.why? : if the skating rink rented three times the pair of skates in april during may, they rented 654 skates. 218 x 3 = 654then, if they want to know how many they rented during both april and may, then you just add 654 (may) and 218 (april) to give you 872 pairs of skates for both months.654 + 218 = 872hope this !

Iam unsure about what the proof is, therefore as much as wish to i can not.