Marco owed his father $250 and began paying him back $20 at the end of each week, beginning November 1st. Joni owed her father $150 and began paying back $10 at the end of each week, beginning on the same day. What Marco owed his father in dollars at the end if n weeks can be represented by f(n) = 250 - 20n. What Joni owed her father in dollars at the end of n weeks can be represented by g(n) = 150 - 10n.

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.