Three months after carla started ninth grade, her hair was 14 inches long. hair grows about 12
1
2
inch per month. which equation shows her hair length at the start of ninth grade?

Assuming that this is for one month and the carrier just takes the ceiling of the total number of minutes that were spent making phone calls in total, you would have 25-5-(.1x)=0. This reduces to 20/.1=x where x = 200. Is that all the info they gave?