Can someone please help me with this? I barely have an idea of where to start. I’m confused on if there are 9 combinations or 144 combinations or whats going on here.
It would be greatly appreciated!
Kailynn has a bag with an equal number of red, yellow and blue marbles.

Harold wrote this equation to model the level of water in a pool over time. the variable x represents time in hours. f(x) = 3,500 - 225x which statements about the situation are true? check all that apply. the water level is rising. the water level is falling. the initial level of water in the pool was 3,500 units. the initial level of water in the pool was 225 units. the pool was empty after 14 hours. the water was 2,600 units high after 4 hours.