Pls i am failing in this class : ((

A) d-3a/3=b

Step-by-step explanation:

d=3a+3b

1) Divide both sides by 3:

d/3=a+b

2) Subtract a from both sides:

d-3a/3=b

In step two you must make the denominator of a 3, thus making the value of the numerator 3a

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