algebra homework, help please?

You want the price for a *gallon* of oil? That would be 4 x the price of a quart,

Let x = the price of a gallon of gas. Let y = the price of a quart of oil.

10x + y = 24.50, which becomes y = -10x + 24.50 for graphing/table purposes

8x + 2y = 22, or 2(4x + y) = 22, or 4x + y = 11, which becomes

y = -4x + 11 for graphing/table purposes

if we assume that x and y are the same values in both equations, we can graph the two equations and find the point of intersection, which is the point (2.25,2). This tells us that the only prices for gas and oil that fit both situations are $2.25/gal for gas (I wish!) and $2/qt for oil.

If you need to find the price of a gallon of oil, you multiply the per qt. price by 4 (because there are 4 qts in a gal.), and you get $8 for a gallon of oil.

Whew!

8x + 2y = 22

10x + 1y = 24.50

y = 2

x = 2.25

i'm not really sure how to say i got that i just plugged numbers in and that one works... sorry :S