Melissa’s family is driving out of state to her grandmother’s house. They know that it takes 20 gallons of gas to get there, and the cost of three gallons of gasoline is $10.50. How much should the family budget to make the one-way trip?

Step-by-step explanation:

We khow that 3 gallons of gasolone are worth 10.50 dollars and it takes 20 gallons to do the one way trip .

we can say that :

        20 gallons⇒ x

          =70

we deduce that : the familly badget must be equal to 70 dollars

-13

step-by-step explanation:

f(x)=2x-5 for f(-4)

f(-4)   means let x=-4

f(-4) = 2(-4) -5

f(-4) =-8-5

      = -13