N-5 less than or equal to -2

What is the product of the radical expression. (7-2square root) (8+2 square root)

If, while training for a marathon, you ran 60 miles in 2/3 months, how many miles did you run each month? (assume you ran the same amount each month) write your answer as a whole number, proper fraction, or mixed number in simplest form. you ran __ miles each month.

Find the area of the regular hexagon if a side is 20 cm.