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Class 9 Lessons
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Post a LessonAnswered 4 days ago Learn CBSE/Class 9/Class 9 Mathematics/Chapter 3 Coordinate Geometry/EXERCISE - 9.2
Saurav Mitra
Tutor
Answered 5 days ago Learn CBSE/Class 9/Class 9 Mathematics/Chapter 4 Linear Equations in Two Variables/EXERCISE - 4.2
Rajesh Kumar N
"Rajesh Kumar N: Guiding Young Minds from 1 to 12 with Expertise and Care"
Correct option: (iii) infinitely many solutions
Why:
The equation y = 3x + 5 is a linear equation in two variables (x and y). Such equations represent a straight line, and every point on the line (every x-value) gives a corresponding y-value. So, it has infinitely many (x, y) pairs that satisfy i
t.
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Answered 5 days ago Learn CBSE/Class 9/Class 9 Mathematics/Chapter 5 Introduction to Euclid’s Geometry/EXERCISE - 5.1
Rajesh Kumar N
"Rajesh Kumar N: Guiding Young Minds from 1 to 12 with Expertise and Care"
Axiom 5 states: “The whole is greater than the part.”
It is considered a universal truth because it is self-evident, applies to all areas of life and mathematics, and does not depend on any condition. It’s always true — whether in geometry, daily life, or logic — making it universally accepted without proof
.
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Answered 4 days ago Learn CBSE/Class 9/Class 9 Mathematics/Chapter 4 Linear Equations in Two Variables/EXERCISE - 4.2
Rajesh Kumar N
"Rajesh Kumar N: Guiding Young Minds from 1 to 12 with Expertise and Care"
Here are four solutions for each equation:
(i) 2x + y = 7
Let x = 0, 1, 2, 3
⇒ y = 7 − 2x
Solutions:
(0, 7), (1, 5), (2, 3), (3, 1)
(ii) πx + y = 9
Let x = 0, 1, 2, 3
⇒ y = 9 − πx
(Approximate π ≈ 3.14)
Solutions (approx.):
(0, 9), (1, 5.86), (2, 2.72), (3, −0.42)
(iii) x = 4y
Let y = 0, 1, 2, 3
⇒ x = 4y
Solutions:
(0, 0), (4, 1
), (8, 2), (12, 3)
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Answered 4 days ago Learn CBSE/Class 9/Class 9 Mathematics/Chapter 4 Linear Equations in Two Variables/EXERCISE - 4.2
Saurav Mitra
Tutor
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