15. jelani is in a walking race at his school. in the first 20 seconds, he
walks 60 meters. in the next 30 seconds, he walks 60 meters. in the
next 10 seconds, he walks 35 meters. in the last 40 seconds, he walks
80 meters.
a. describe how jelani's walking rate changes during the race.
b. what would a graph of jelani's walking race look like?

Astudent found the solution below for the given inequality. |x-9|< -4 x-9> 4 and x-9< -4 x> 13 and x< 5 which of the following explains whether the student is correct? -the student is completely correct because the student correctly wrote and solved the compound inequality. -the student is partially correct because only one part of the compound inequality is written correctly. -the student is partially correct because the student should have written the statements using “or” instead of “and.” -the student is completely incorrect because there is no solution to this inequality.