Alright, so for question 8, your answer would be $3.25. Just multiply $4.65 by five, then subtract twenty from it to figure out the difference.
$4.65 x 5 = $23.25
Take the twenty dollars for the pass, and subtract it from the $23.25
$23.25 - $20.00 = $3.25
As for number 9, it would be easier to buy the pass, as it would cost you 14 dollars less.
If you pay everyday:
$5.25 x 16 = 84
As for the pass, it is 70 dollars.
84 - 70 = 14
There is a 14 dollar difference, thus making the pass the cheapest option.
In answer to the other one:
Mulitply
$2.50 x 20 = 50
Subtract
$50.00 - $45.25 = $4.75
