Please answer the question asap

Please answer the question asap Ring o Alarms only Until you turn off Do Not Disturb TURN OFF NOW 21)SO've multiplication — 9y — 19 O Solve x y - 3 — x-y is 22)Find the greatest exactly divisible hy 24, 1 5, and 36, Section D (Question numbers 23 10 30 carry 4 marks each). path A rests a point the path. It n'aches a height of90m on the wall makes an with the I r while resting at same point on it were made to against Other it have tnade angle of with (he ground. Find the height it would have reuched on the second wall. A bird is sitting on the •,vhieh is 80m highL The angle of elevation of the bird from a point on the ground is 450_ He bird flics away fram the point of horizontally and remains at a hei91L After 2 seccmds (he anele ot- elevation or the bird the point of becomes 300 Yind the speed of flying of the bird. 24)Find the missing frequencies n. and LA in the following frequency distribution. when it is given that = and 50 Class 0-20 20-40 40-60 60-80 80-100 Total OR Second M ode' O

Dear Student,
Here is the solution of your asked query:
Q21.

The given system of equations are 7 x - 9 y = 19 . . . (i) 4 x + 5 y = 21 . . . (ii) Multiplying (i) by 4 and (ii) by 7 and subtracting (ii) from (i) we get; 4 (7 x - 9 y) - 7 (4 x + 5 y) = 19 \times 4 - 21 \times 7 \Rightarrow 28 x - 36 y - 28 x - 35 y = 76 - 147 \Rightarrow - 71 y = - 71 \Rightarrow y = 1 then from (i) we get; 7 x - 9 \times 1 = 19 \Rightarrow 7 x - 9 = 19 \Rightarrow 7 x = 28 \Rightarrow x = 4

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