A sales tax of 7% was added to the $30 price of a jacket. What was the total cost of the jacket? $21.00
$30.07
$27.90
$32.10

It would be $32.10!
Explanation:
Every time you need to calculate this type of question, a supe easy way to do it is just google (the sales tax percent) of (the price of the item) like for this one it’s 7% of 30 and then the answer it gives (2.1) is the sales price so you just do 30+2.1=32.10 (add a zero at the end because it’s money!) hope this helped for the future :))

J= r + 9 because since jessica rode 9 more miles than roger, you add 9 miles to rogers mileage.