The equation d= 12w represents the amount in dollars, d, that mana saves in w weeks. what is the constant of proportionality? what does it represent in this situation?

Acyclist bike x distance at 10 miles per hour .and returns over the same path at 8 miles per hour.what is the cyclist average rate for the round trip in miles per hour ?

Nicole purchased a container of cashews that weighs 5 kilograms. zion purchased a container of cashews that weighs 4,900 grams. how many more grams of cashews did nicole purchase?

Given abc find the values of x and y. in your final answer, include all of your calculations.