K=5 which makes y=0
Plug in -16 for x which means y=7
Therefore, - 16,7 will be the value of x,y that has no solution.
use an equation of ratios to determine the amount of gas needed to fill the tank.
so, 0.2x = (0.8)(288.75 gal), and x = = 1155 gal.
it would take 1155 gal. to fill the tank.
the cost would be
1155 gal $3
* = $3465 (answer)
1 1 gal
hope this you
2x + 5y...