At the gas station the equation c=2.80g gives the relationship

Step-by-step explanation:

Let

g ----> number of gallons of gasoline

c ---> the total cost in dollars

we have

First gas station

This is a proportional relationship between the variables c and g

The constant of proportionality k or unit rate (slope) is equal to

Second gas station

we have the ordered pairs

(2.5,8.30) and (5,16.60)

This is a proportional relationship between the variables c and g

The constant of proportionality k is equal to

the linear equation is

To find out how much per gallon would Billy save, subtract the unit rate of the Gas station 1 from the unit rate of the Gas station 2

so

step-by-step explanation:

milk=16 large

soda=280 kids

juice box=82 regular

63 soda +63 regular

124 large total

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.