Four gallons of gasoline cost $14. A customer will get
gallon for $3.50.

A customer will get
gallons for $7.00.

A customer will get
gallons for $14.00.

A customer will pay $
for 6 gallons.

A customer will get 1 gallon for $3.50.

A customer will pay $ 21 for 6 gallons.

A customer will get 4 gallons for $14.00.

A customer will get 2 gallons for $7.00.

Step-by-step explanation:

This is solved using the unitary method .

Four gallons cost $ 14

1 gallon costs $ 14/4= $ 3.5

6 gallons cost = $ $ 14/4 *6= $ 21

2 gallons cost = $ 14/4 *2= $14/2= $ 7

A customer will get 1 gallon for $3.50.

A customer will pay $ 21 for 6 gallons.

A customer will get 4 gallons for $14.00.

A customer will get 2 gallons for $7.00.

This can be found out by using the direct ratio as well.

Gallons                   Cost

4                               $14

1                                x

Using cross product

x*4= $ 14*1

x= $ 14/4 = $3.5

The same can be applied to find the rest and we get the same answers.

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.