Which statement is correct about the graph of the equations (22x+33y=99) and (2x+3y=12)?
Answer and explanation
Correct answer: Lines are distinct parallel
For two linear equations, compare the ratios of the coefficients of x and y with the ratio of the constant terms. If the x-coefficient ratio and y-coefficient ratio are equal, but the constant ratio is different, the two equations represent different parallel lines. Such lines never meet, so the pair has no common solution. This is the idea behind option C, distinct parallel lines.
Here, the ratios are \(22/2=11\) and \(33/3=11\), while \(99/12=8.25\). Thus the first two ratios are equal, but the third is not. Therefore, the lines have the same direction but different positions. They are not coincident, because coincident lines would have all three ratios equal; they are also not perpendicular or intersecting.
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What is the correct answer to this question?
Lines are distinct parallel
Why is this the correct answer?
For two linear equations, compare the ratios of the coefficients of x and y with the ratio of the constant terms. If the x-coefficient ratio and y-coefficient ratio are equal, but the constant ratio is different, the two equations represent different parallel lines. Such lines never meet, so the pair has no common solution. This is the idea behind option C, distinct parallel lines.
Here, the ratios are \(22/2=11\) and \(33/3=11\), while \(99/12=8.25\). Thus the first two ratios are equal, but the third is not. Therefore, the lines have the same direction but different positions. They are not coincident, because coincident lines would have all three ratios equal; they are also not perpendicular or intersecting.
Which subject and chapter does this question cover?
This is a Class 10 Mathematics question. Chapter: Pair of Linear Equations in Two Variables. Topic: Conditions for solvability.
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