Answer: The family budget to make the one-way trip should be $70.
Step-by-step explanation:
Given: The cost of three gallons of gasoline=$10.50
Therefore, the cost of one gallon of gasoline=[tex]\frac{10.50}{3}=\$3.5[/tex]
Since, they need 20 gallons for driving out of state to her grandmother’s house.
The cost of 20 gallons of gasoline = [tex]20*3.5=\$70[/tex]
Therefore, The family budget to make the one-way trip should be $70.
