ICSE Class 10 Maths Ratios

• can you please answer all 4 9f these questions
  
• pls answer this question
  
• Wt is ratio
• Find the ratio in which the join of AB is divided by yaxis where A=(-3,8) and B=(5,0) also find the point p on y axis
• if (a-b):(a+b)=1:11,find the ratio (5a+4b+15):(5a-4b+3).
• 5*20
  
• If x:y=16:21&y:z=18:9 find x:y:z
• Divide rupees 1290 into A,B and C such that A is 2/5 of B and B:C = 4:3
• Three positive numbers are in the ratio 1/2:1/3:1/4.Find the numbers of the sum of their squares is 244.
• A can do work in 15 days and B can do work in 20 days . What fractions of the work will be left if they work on it together for 4 days?

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