1. the stanton athletic club twilight bicycle race fees are $25 per race for uscf licensed riders and $15 for junior racers. the total number of racers was 321. the income from the fees was $6935 a) what are the variables in this situation and what does each one represent? b) write a system of equations to determine the number of racers of each type. c) solve the system of equations using a graph.

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.