Can you please help me and explain how to do both of these problems, I don't understand

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?

Measure a and b and find their sum. how are the angles related?

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.