Adv
mehak
  • 0
Newbie

20. Determine graphically whether the system of equations x – 2y = 2, 4x – 2y = 5 is consistent or in-consistent.

  • 0

What does consistent or inconsistent means?

How to determine if an equation is graphically consistent or inconsistent?

Class 10th, rd sharma

Share

1 Answer

  1. Solution:

    Given,

    x – 2y = 2……. (i)

    4x – 2y = 5……. (ii)

    For equation (i),

    ⇒ y = (x – 2)/2

    When x = 2, we have y = (2 – 2)/2 = 0

    When x = 0, we have y = (0 – 2)/2 = -1

    Thus, we have the following table giving points on the line x – 2y = 2

    x 2 0
    y 0 -1

    For equation (ii),

    We solve for x:

    ⇒ x = (5 + 2y)/4

    So, when y = 0

    x = (5 + 2(0))/4 = 5/4

    And, when y = 1.5

    ⇒ x = (5 + 2(1))/4 = 7/4

    Thus, we have the following table giving points on the line 4x – 2y = 5

    x 5/4 7/4
    y 0 1

    Graph of the equations (i) and (ii) is as below:

    R D Sharma Solutions For Class 10 Maths Chapter 3 Pair of Linear Equations in Two Variables ex 3.2 - 20

    It is clearly seen that the two lines intersect at (1,0).

    Hence, the system of equations is consistent.

    • 0
Leave an answer

Leave an answer

Browse

Choose from here the video type.

Put Video ID here: https://www.youtube.com/watch?v=sdUUx5FdySs Ex: "sdUUx5FdySs".

Captcha Click on image to update the captcha.

Related Questions