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Q)Jaya scored 40 marks in a test getting 3 marks for each correct answer and losing 1 mark for each incorrect answer., Had 4 marks being awarded for each correct answer and 2 marks were deducted for each incorrect answer then Jaya again would have scored 40 marks. How many questions were there in the […]
pair of linear equations
Q) Using graphical method, find whether following system of linear equations x = 0 and y = – 3 is consistent or not. Ans:Â Draw graph for y = – 3 and x = 0. As y = – 3 is intersecting x = 0 at (0,-3); So, system of equations is consistent.
Q) Half of the difference between two numbers is 2. The sum of the greater and twice the smaller number is 13. Find the numbers. Ans: Step 1: Let the numbers be x and y. Here, x is the greater number and y is the smaller number. Step 2: by 1st condition, we get: ½ (x-