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fgiga [73]
3 years ago
15

At what value of x do the graphs of the equations below intersect?

Mathematics
2 answers:
Zarrin [17]3 years ago
8 0

Answer:

x = 2

Step-by-step explanation:

  1. You would find a value of y to plug into either of the equations. For example, I chose the equation 2x - y = 6. When I set it equal to y, I got y = 2x - 6
  2. Now that I know what y is equal to, I plugged it into the second equation to get 5x + 10 (2x - 6) = -10
  3. You then would calculate for x.
  4. Your end result should be x = 2, which is the point that the two equations intersect

This works because the two equations are set equal to each other, making them share a common value between them.

You can also plug both of these equations into a graphing calculator, and on the graph select the command to calculate the intersection.

Hope this helped!

pychu [463]3 years ago
6 0

Answer:

x = 2

Step-by-step explanation:

Given the 2 equations

2x - y = 6 → (1)

5x + 10y = - 10 → (2)

Multiplying (1) by 10 and adding to (2) eliminates the y- term.

20x - 10y = 60 → (3)

Add (2) and (3) term by term to eliminate y, that is

25x = 50 ( divide both sides by 25 )

x = 2

The value of x at the point of intersection is x = 2

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Answer:

{10,8}

Step-by-step explanation:

-3x + 4y = -62

4x + 5y = 0

let's eliminate the x

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4x + 5y = 0 | x 3 |

12x - 16y = 248

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-------------------- -

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since you must do this proble with elimination, we cant use subtitution. so we repeat the way once more to find x (eliminate y)

-3x + 4y = -62 | x 5 |

4x + 5y = 0 | x 4 |

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16x + 20y = 0

-------------------- -

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