Please answer these questions

Please answer these questions 16-9 persons went to a hotel tor taking the'r meals. 8 ot them "*Dent Rs.12 each on their meals and the 9th spent Rs.8 more than the average expenditure of all the nine. What was the total money spent bv them? 17. There were 35 students in a hostel. Due to the admission of 7 new students, the expenses of the mess were increased by Rs.42 per day while the average expenditure per head diminished by Re.l. What was the original expenditure of the mess? IS.lf the polynomial x' +16x2 —25x+ 10is divided by (x2 —2x+k)the remainder comes out to be x + a, find kanda. 19. Find the polynomial Of least degree which should be subtracted from the polynomial +2r3 Ax' +6x—3so that it is exactly divisible by x: —x+l. 20.Find the mean concentration of S02 in the air. Concentration frequency of S02 (in ppm) 0.00-0.04 0.04-0.08 0.08-0.12 0.12-0.16 0.16-0.20 0.20-0.24 4 9 9 2 4 2