Write an expression to describe the sequence below. use n to represent the position of a term in the sequence, where n = 1 for the first term.

-2, -4, -6, -8,

-2n

Step-by-step explanation:

-2,-4,-6,-8

the difference between each number is 2

since all numbers are negatives it's going to be a negative nth term

now

-2 * (1) = -2

-2* (2) = -4

-2* (3) = -6

-2* (4) = -8

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