Can someone me with variable expressions

What is the difference of the fractions use the number line and equivalent fractions to find the answer -2 1 2 -1-34 i’m already started the quiz

What is the sum of these mixed numbers 2 1/8 + 4 3/8

Suppose sat writing scores are normally distributed with a mean of 497 and a standard deviation of 109. a university plans to award scholarships to students whose scores are in the top 2%. what is the minimum score required for the scholarship? round your answer to the nearest whole number, if necessary.