The 7th and 8th grades have enrollments of 520 and 650 respectively. the two grades have a total of 18 representatives on the student council. how many representatives should the 8th grade have if there is to be a fair representation of the two grades?

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.