Look at the following function x -12 -8

The sum of two numbers is 86, and their difference is 20. find the two numbers

In a singing competition, there are 150 participants. at the end of each round, 40% of the participants are eliminated. how many participants are left after n rounds?

When a valve is open 281 gallons of water go through it in one hour the number of gallons that would go through in 94 hours is