Me with this question: ted writes the following equation, write the number the makes the equation correct

i think the answer is 800 but this is a fraction sheet i'm on working on it don't know what to do it might be a trick question

Find the sum of the measure of the interior angles of a polygon of 9 sides ; of 32 sides

The accompanying table shows the numbers of male and female students in a particular country who received bachelor's degrees in business in a recent year. complete parts (a) and (b) below. business degrees nonbusiness degrees total male 189131 634650 823781 female 169539 885329 1054868 total 358670 1519979 1878649 (a) find the probability that a randomly selected student is male, given that the student received a business degree. the probability that a randomly selected student is male, given that the student received a business degree, is nothing. (round to three decimal places as needed.) (b) find the probability that a randomly selected student received a business degree, given that the student is female. the probability that a randomly selected student received a business degree, given that the student is female, is nothing. (round to three decimal places as needed.)

Find the solution of this system of equation -7x+y=-20 9x-3y=36