Math Problem Statement
The line V passes through the points (-5,3) and (7,-3) and the line W passes through the points (2,-4) and (4,2). The lines V and W intersect at the point A. Work out the coordinates of point A
Solution
To find the coordinates of the intersection point between the lines and , we need to find the equations of both lines and solve them simultaneously.
Step 1: Find the equation of line
The line passes through the points and .
First, calculate the slope of line using the formula:
Now, use the point-slope form of the equation of a line with one of the points, say :
So, the equation of line is:
Step 2: Find the equation of line
The line passes through the points and .
First, calculate the slope of line using the formula:
Now, use the point-slope form with one of the points, say :
So, the equation of line is:
Step 3: Solve the system of equations
Now, solve the two equations simultaneously:
Set them equal to each other:
Multiply through by 2 to eliminate the fractions:
Now, solve for :
Substitute into one of the original equations, say :
Final Answer:
The coordinates of point , where the lines intersect, are .
Would you like any further details or clarifications? Here are five related questions you might find interesting:
- How do you calculate the slope of a line?
- What is the point-slope form of a line equation?
- How can you determine if two lines are parallel?
- What are the conditions for two lines to intersect at right angles?
- How do you find the distance between two points on a coordinate plane?
Tip: When solving simultaneous equations, it is often easier to eliminate fractions by multiplying through by the denominator.
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Math Problem Analysis
Mathematical Concepts
Coordinate Geometry
Simultaneous Equations
Slope of a Line
Intersection of Lines
Formulas
Slope formula: m = (y2 - y1) / (x2 - x1)
Point-slope form of a line: y - y1 = m(x - x1)
Equation of a line: y = mx + c
Solving simultaneous equations
Theorems
Two lines intersect when their equations yield a common solution.
Suitable Grade Level
Grades 9-10
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