Y=-5/2x-5 y=-4/3x-1 y=-x+3 y=-4x-1 2x-y=1 x+2y=-8 8x+3y=-9 4x+5y=-10 x-y=-2 4x-3y=9 y=-1 x+5y=-15 -27-10+2x=0 x+5+y=0 3x+20=-4y -15-x=-5y -1=-2x+y -x-1=y 0=5y-x -30+10y=-2x

use an equation of ratios to determine the amount of gas needed to fill the tank.

    0.2             0.8

  =    

288.75             x

                                                              231 gal

so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.

                                                                0.2

it would take 1155 gal. to fill the tank.

the cost would be

1155 gal         $3

* = $3465   (answer)

      1           1 gal

hope this you

1. 3

2. 4

3. 1

hope this ! have a great day.

-wfz