Problema Solution
Gas cost $3.39 per gallon:
A. Let g represent the number of gallons of gasoline purchased. Write an expression for the total cost of purchasing g gallons.
B. James has $30 in his pocket to spend on gasoline. Write an equation that describes the relationship between the cost of gas (Your expression from above) and $30. Solve your equation to determine how many gallons of gas he can purchase, round to the nearest hundredth, and be sure to include the appropriate unit.
C. Christine establishes a weekly budget for fuel and decides she can spend no more than $50 a week on fuel. Write an inequality that describes the relationship between the cost of gas and $50. Then solve your inequality to determine how many gallons of gas she can purchase, round to the nearest hundredth, and be sure to include the appropriate unit.
Answer provided by our tutors
a) total cost C = 3.39g where g is # off gallons of gasoline.
b)let x be the # of gallons that can be purcahsed in $30
so 30=3.39x
x= 30/3.39 = 8.85
c) she can't spend more than $50
so 3.39x ≤ 50
x ≤ 50/3.39 = 14.75
x ≤ 14.75
she cant but more than 14.75 gallons