In business, the break-even point is the point (x, y) at which the graphs of the revenue and cost functions intersect. this is the point where the revenue and the expenses are equal. the business is not losing money, but it is not making money either. for one manufacturing company, the revenue from producing x items is given by the function y = 2x + 12 and the cost of producing x items is given by y = −x2 + 10x + 5. the numbers represent thousands. find all break-even  points. interpret the results.

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.