There are n gallons of oil. after m gallons have been used then, in terms of m and n, what percent of oil remains? what percent was used? plz

Step-by-step explanation:

Normally wiht number you would just have to do a rile of thirds, but in this case you need to used the values and to think a little outside the box.

YOu knwo that the total number of gallons is "n".

And the used gallons is "m"

To calculate the percentage used you use the next rule of three and clear for "x".

so that would be the expression for gallons used, the remaining gallons expression would be (n-m), so we do the same rule of three but witht the remaining gallons expression:

And that would be the expression for percentage of gallons left.

to plot points   for x just start at the origin (middle) and go to the left however many times it say(if the number is a positive) if the number is a negative then go right however many times it says if it is 0 go nowhere

now keep you pencil there and go up however many times it says on y(if it is positive) if it is negative then go down however many times it says. if it says 0 go nowhere.

you have just plotted a point! now when you finish plotting all of them connect them with a ruler

plot each point as (-3, 7), (0,4), (3,1), (8,-4)   in the parenthesis on the left of the comma is x and the right is y.