Cho so thuc a<0. tim dieu kien can va du de (-∞;9a) ∩ (4/a;+∞) ≠ Ф

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

1jessica's home town is a mid-sized city experiencing a decline in population. the following graph models the estimated population if the decline continues at the same rate. select the most appropriate unit for the measure of time that the graph represents. a. years b. hours c. days d. weeks

Jane’s favorite fruit punch consists of pear, pineapple, and plum juices in the ratio 5: 2: 3. how many cups of pear juice should she use to make 20 cups of punch?