10. Solve the system using substitution. (2 points) 3x - y = -1
x - y = -3
What is the solution for y?
-4
- 1
1
4

.5 lb

step-by-step explanation:

12 in / 6 in =2 in

.25 x 2 = .5 lb

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