(1/2) / (1/4) =
1/2 * 4 = 4/2 = 2 ....she needs to fill it 2 times
7*24 = 168 quarts of water per day goes into barrel.
25*48 = 1200 quarts of waste water picked up
1200÷168 =7.142857143
The value of the highlighted variables ave been determined a =6, b= 2 ,c= 6 , d = 2 , e = 6 , f = 6, g =1
<h3>What is an Expression ?</h3>
An expression are mathematical statement consisting of variables , constants and mathematical operators .
The given expression is

a = 6
b= 2
c= 6
d = 2
e = 6
f = 6
g =1
Therefore the value of the highlighted variables ave been determined.
To know more about Expression
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Answer: 14gallons
Step-by-step explanation:
12gallons/144miles = 1gallon/12miles
Therefore 6gallons = 12*6 = 72miles.
In order to cover 240miles, she will need 240/12 = 20gallons.
20-6 = 14gallons
She will need 14gallons of gas more.