Darryl bought 7 hats. a week later half of all his hats were destroyed in a fire. there are only 24 hats left. how many hats did he start with?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Which number line correctly shows 0.8 + 0.3?

Can someone show me step by step how to do this?