Dollars is the dependent quantity because the amount you pay depends on how many gallons you've pumped.
2. 6m
3. No, she has 2.8ft of fabric. She is 2.2 yards short... :)
So we can set up a simple equation for this, where the word “what” is a variable, x. This equation is 3 - x=11. Then we subtract 3 from both sides, giving us -x=8. We can divide both sides by -1, giving us x=-8. The answer would be -8. Hope this helped.