Hey there! To represent the value of the jar after purchasing candy bars for x amount of days, we can start with the initial value of $145 and subtract $0.50 for each candy bar purchased.
So, the equation would be: Value of the jar = $145 - ($0.50 * x)
Now, if Ted bought 17 candy bars, we can substitute x with 17 in the equation to find out how much money is left in the jar. Let's calculate it!