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Check whether the three lines represented by the equations given below intersect at a commonpoint.2x + y - 1 = 04x + 3y + 5 = 05x + 4y + 8 = 0Show your work.

Question

Check whether the three lines represented by the equations given below intersect at a common point.

  1. 2x + y - 1 = 0
  2. 4x + 3y + 5 = 0
  3. 5x + 4y + 8 = 0

Show your work.

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Solution

To check if the three lines intersect at a common point, we can solve the system of equations. Here are the steps:

  1. We have the three equations:

    2x + y - 1 = 0 ---- (1)

    4x + 3y + 5 = 0 ---- (2)

    5x + 4y + 8 = 0 ---- (3)

  2. Let's multiply equation (1) by 2, we get 4x + 2y - 2 = 0. Let's call this equation (4).

  3. Now, subtract equation (4) from equation (2), we get y + 7 = 0, which simplifies to y = -7.

  4. Substitute y = -7 into equation (1), we get 2x - 7 - 1 = 0, which simplifies to 2x = 8 and x = 4.

  5. Now we have the point (4, -7). Let's substitute these values into equation (3) to check if it holds true.

    Substituting x = 4 and y = -7 into equation (3), we get 54 + 4(-7) + 8 = 20 - 28 + 8 = 0, which is true.

So, the three lines represented by the given equations intersect at the common point (4, -7).

This problem has been solved

Similar Questions

Check whether the three lines represented by the equations given below intersect at a commonpoint.2x + y - 1 = 04x + 3y + 5 = 05x + 4y + 8 = 0Show your work.

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375. Give coordinates for a point that is 8 units from the line y = 5. Then find both pointson the line 3x + 2y = 4 that are 8 units from the line y = 5

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