Question

Now you want to keep track of how much it will cost you each month. Your insurance cost is $85 per month and gas cost is $3.29 per gallon. How can you know the total monthly cost for your car? How much would you spend a month if you drive 25 gallons daily.

Answer 1

We can write the following equation to represent the situation in the problem:

$y=85+3.29x$

where y is the total money spent in one month and x is the number of gallons consumed in one month.

Now, if you drive 25 gallons daily, then for a month we have:

$25(30)=750$

in one month we will need 750 gallons if we drive 25 gallons daily. Then, we can make x = 750 and solve for y:

$\begin{gathered} x=750 \\ \Rightarrow y=85+3.29(750)=85+2467.50=2552.50 \\ y=\ 2552.50 \end{gathered}$

therefore, you would spend $2552.50 if you drive 25 gallons daily