20 points answer quick! If line MN is a midsegment of triangle ABC, find the values of x and y

Find the value of X

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Carl's candies has determined that a candy bar measuring 3 inches long has a z-score of +1 and a candy bar measuring 3.75 inches long has a z-score of +2. what is the standard deviation of the length of candy bars produced at carl's candies?

In dire need~! describe how to use area models to find the quotient 2/3 divided by 1/5. check your work by also finding the quotient 2/3 divided by 1/5 using numerical operations only.