Final answer:
Conan has some money to spend on gas for his car. The missing value in the linear equation 5x + 2y = _____ can be found with more information or another equation.
Step-by-step explanation:
In the given question, Conan has some money to spend on gas for his car. We can represent this situation using the linear equation 5x + 2y = _____, where x represents the number of gallons of gas and y represents the cost of gas. To find the missing value, we need more information or another equation.