Graph the functions on the same coordinates axis. What are the solutions to the systems of equation?

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

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?

How many 3/8s are in 6 plz someone tell me now