How many groups are 3/8 and 7/8

What is the simplified expression for 6(2(y+x))

This race was first held in 1953 on august 16th. every decade the race finishes with a festival. how many years is this?

At the beginning of the day, stock xyz opened at $6.12. at the end of the day, it closed at $6.88. what is the rate of change of stock xyz? a. 1.17% b. 11.0% c. 12.4% d. 81.5%