87.4k views
1 vote
Carlos solved a system of linear equations. He found that exactly one point satisfied both equations. What do you know for certain is true about the two lines

2 Answers

4 votes

Answer:The two lines intersect (in other words, they have a common meeting points)

Step-by-step explanation:Step-by-step explanation:

Thinking process:

A linear equation takes the form of

where , m = gradient

c = y-intercept (point where the line cuts the y-axis)\

Suppose we have these two linear equations:

We can find the point of intersection by solving the two equations simultaneously like this:

sub y = 2x + 4 into equation (2) gives:

2(2x+4) = -6x -1

solving yields - 0.9

Substituting x= -0.9 into equation 1 yields:

y = 2.2

In terms of the Cartesian coordinates (x, y) the point of intersection will be (-0.9, 2.2)

Hence, the point of intersection is a solution of two linear equations.

User Garlapak
by
7.8k points
4 votes

Answer:

The two lines intersect (in other words, they have a common meeting points)

Explanation:

Thinking process:

A linear equation takes the form of
y = mx + c

where , m = gradient

c = y-intercept (point where the line cuts the y-axis)\

Suppose we have these two linear equations:
y = 2x + 4\\ 2y = -6x -1

We can find the point of intersection by solving the two equations simultaneously like this:

sub y = 2x + 4 into equation (2) gives:

2(2x+4) = -6x -1

solving yields
x= - 0.9

Substituting x= -0.9 into equation 1 yields:


y = 2 (-0.9) + 4\\ = -1.8 + 4\\ = 2.2

y = 2.2

In terms of the Cartesian coordinates (x, y) the point of intersection will be (-0.9, 2.2)

Hence, the point of intersection is a solution of two linear equations.

User Alex Haas
by
7.4k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories