Is (-4, 2) a solution of 4x + 5y <-7?

No

Step-by-step explanation:

To solve this problem, plug the given coordinates in for x and y.

If x = -4 and y = 2, the inequality is 4(-4) + 5(2) < -7.

Evaluating 4*-4 and 5*2, the inequality becomes -16 + 10 < -7.

Evaluating -16 + 10, the inequality becomes -6 < -7.

-6 is not less than -7, so (-4, 2) is not a solution of the inequality.

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