In which pairs of matrices does AB = BA? A = [ 22 ]B=[2]
A=[-1 %]B =[-3]
A =[-12]B=[52]
A = [ 2 ]B =[8-%3]

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