Maths-
General
Easy
Question
Classify the linear equations x = 2y and, y = 2x as having one solution, no solution or infinitely many solutions.
Hint:
. For Equations with Unique solution (One solution):-
(a1/a2) ≠ (b1/b2)
2. For Equations with Infinitely Many solutions:-
(a1/a2) = (b1/b2) = (c1/c2)
3. For Equations with No solution:-
(a1/a2) = (b1/b2) ≠ (c1/c2)
The correct answer is: The linear equations x=2y and y=2x have Unique solution
Step-by-step solution:-
x = 2y
∴ x - 2y = 0 .................. (Taking variables and constants on each side of the equation) ............................... (Equation i)
y = 2x
∴ y - 2x = 0 .................. (Taking variables and constants on each side of the equation)
i.e. 2x - y = 0 ..................................................................................... (Equation ii)
Comparing Equations i & ii with the standard form of a linear equation in 2 variables, i.e. ax + by = c, we get-
a1 = 1; b1 = -2; c1 = 0 and
a2 = 2; b2 = -1; c2 = 0
Now, we calculate a1/a2; b1/b2 and c1/c2 to check the corelation between the 3:-
a1/a2 = 1/2 ............................................................................................................................................................ (Equation iii)
b1/b2 = -2/-1 = 2 ....................................................................................................................................................... (Equation iv)
c1/c2 = 0/0 = 0 ......................................................................................................................................................... (Equation v)
From Equations iii, iv & v, We observe that-
a1/a2 ≠ b1/b2 ≠ c1/c2 for the given Equations.
∴ The given Equations have Unique Solution.
Final Answer:-
∴ The linear equations x=2y and y=2x have Unique solution.
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In An academic contest, the Correct answer earns 12 points and the incorrect answer loses 5 points. In the final round, School A starts with 165 points and gives the same number of correct and incorrect answers. School B starts with 65 points and gives no incorrect answers and the same number of correct answers as school A. The game ends with the two schools tied. Find
a) Frame the equation which models the scoring in the final round and the outcome of the contest?
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The equation is defined as a mathematical statement with at least two terms containing variables or numbers that are equal.
Let's take an example:
Assume the hours are "h" when attempting to equalize,
As per the given question, we can write the equation as:
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The Price of Stock A at 9 A.M was 12.73 .Since then the price has been increasing at the rate of Rs 0.06 per hour. At noon , the price of stock B was Rs 13.48 .It begins to decrease at the rate of Rs 0.14 per hour. If the stocks continue to increase and decrease at the same rates, in how many hours will the prices of the stocks be the same?
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The equation is defined as a mathematical statement with at least two terms containing variables or numbers that are equal.
Let's take an example:
Assume the hours are "h" when attempting to equalize,
As per the given question, we can write the equation as:
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Rearrange the terms of h in the above equation,
0.06h + 0.14h = 13.48- 12.73
In the above equation, combine the corresponding terms,
0.2h = 0.75
Divide both sides by 0.2
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