Based on the data how much taller in inches is the average eleventh grader than the average fifth grader?

Due to financial difficulties the owner of 4 skateboard stores is going to close 2 of his stores. based on the money earned at each store, which two stores should remain open?

How many and of which kind of roots does the equation f(x)=x3−x2−x+1

For what values of a is the sum of the fractions 2a−1 / 4 and a−1 /3 positive?