Suppose that 23 inches of wire costs 69 cents. At the same rate how much ( in cents ) will 18 inches of wire cost?

Solution:

Given that,

23 inches of wire costs 69 cents

Cost of 18 inches of wire = 18 x cost of 1 inch of wire

Cost of 18 inches of wire = 18 x 3

Cost of 18 inches of wire = 54

Thus cost of 18 inches of wire is 54 cents

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