if Lindsey is 9 inches taller than Jessica if you add 9 inches to Jessica's height then you will get Lindsey's height, which is great than 65 so you need to put the correct sign in which is >.
1 because 20 times 10 is 200 and if he starts with 500 then he can withdraw 20 dollars a week for 10 weeks to have 300 left by the end of the summer, hope this helps :)