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.

Russell is correct.

Step-by-step explanation:

It is given that Quadrilateral PQRS is located at P (0, 1), Q (3, 2), R (4, 0), and S (1, −1).

Distance formula:

Slope formula:

Using distance and slope formula find the length and slope of each side.

Segment PQ : P(0, 1) and Q(3, 2).

Segment SR : S(1, −1) and R(4, 0).

Segment PS : P(0, 1) and S (1, −1)

Segment QR : Q(3, 2) and R(4, 0)

Slope of parallel lines are same.

Segments PQ and SR are both congruent and parallel, and segments PS and QR are both congruent and parallel.

PQRS is a parallelogram because opposite sides are both congruent and parallel.

Product of slopes of perpendicular lines is -1.

Product of slope of two adjacent sides is

Therefore adjacent sides are not perpendicular. It means the PQRS is not a rectangle.

Therefore, Russell is correct.