Line l passes through the points (- 4, 3) and (2, 1) What is the slope of a line that is perpendicular l

Christine went shopping and bought each of her six six nephews a? gift, either a video costing? $14.95 or a cd costing? $16.88. she spent ? $ 97.42 97.42 on the gifts. how many videos and how many cds did she? buy?

Order the measurements from the least to the greatest. 2,720 ml , 24.91 l , 0.0268 kl

Does anyone know how to solve and graph this: 4 + | a + 2 | < 7the only part i don't get is the "4 +"