Justin is creating a budget. He has exactly $20 to spend on gas each month. Gas is currently $2.50 a gallon. If the function f(x) = 20 -2.50x, represents the amount of money he has left after buying x gallons of gas, what is the domain?

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.