Maharashtra Board Class 9 Mathematics — Flashcards

A: This is NOT a set. Reason: The word 'tall' is relative and subjective. Different people have different definitions of 'tall', so we cannot definitely and clearly decide who belongs to this collection.

A: Step 1: Identify all vowels in the English alphabet: A, E, I, O, U. Step 2: Write them in curly brackets, separated by commas. Step 3: Each element is written only once (no repetition). Answer: A = {A

A: Step 1: Understand the set builder form: x is an even natural number AND x < 11. Step 2: List even natural numbers less than 11: 2, 4, 6, 8, 10. Step 3: Write in listing method with curly brackets. An

A: Point, Line, and Plane are the three basic undefined terms in geometry. These are fundamental concepts that we do not define but use to build all other geometric concepts. Lines and planes are sets of

A: The distance between points D and E is 2 units. Distance = larger coordinate - smaller coordinate = 3 - 1 = 2. This is written as d(D,E) = 2 or l(DE) = 2.

A: To find distance between two points: 1) Identify their coordinates, 2) Subtract the smaller coordinate from the larger coordinate. The result is always positive. For example: if A is at -5 and B is at

A: Rational numbers: 5/7, 0, -3, 2.5, 1.333...(repeating) Explanation: A rational number is any number that can be expressed as p/q where p and q are integers and q ≠ 0. - 5/7 is already in p/q form - 0

A: Step 1: Let x = 2.3̄ = 2.3333... Step 2: Since one digit (3) repeats, multiply by 10: 10x = 23.3333... Step 3: Subtract: 10x - x = 23.3333... - 2.3333... 9x = 21 Step 4: Solve for x: x = 21/9 = 7/3 An

A: Step 1: Let x = 1.24̄ = 1.2444... Step 2: Since the digit 4 repeats, but 2 doesn't, multiply by 100 (two decimal places before repeat): 100x = 124.444... Step 3: Also multiply by 10: 10x = 12.444... S