Joan received $100 in gift cards for an online music store. each time she buys a new song it costs $1.29. she has already bought 10 songs. write an inequality that models the situation. then determine the number of songs she can buy and not run out of money.

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.