Math Problem Statement

The midpoint of line segment PQ is located at M(-5, 2). If point P is located at (-7, -2), what are the coordinates of point Q?

Solution

The problem gives the midpoint MM of line segment PQPQ at coordinates (5,2)(-5, 2), and point PP at coordinates (7,2)(-7, -2). You are asked to find the coordinates of point QQ.

Midpoint Formula:

The midpoint MM of a line segment is given by: M=(x1+x22,y1+y22)M = \left( \frac{x_1 + x_2}{2}, \frac{y_1 + y_2}{2} \right) where (x1,y1)(x_1, y_1) and (x2,y2)(x_2, y_2) are the coordinates of points PP and QQ, respectively.

Step-by-step solution:

Let the coordinates of point QQ be (x2,y2)(x_2, y_2).

  1. For the xx-coordinates: 5=7+x22-5 = \frac{-7 + x_2}{2} Multiply both sides by 2: 10=7+x2-10 = -7 + x_2 Add 7 to both sides: x2=3x_2 = -3

  2. For the yy-coordinates: 2=2+y222 = \frac{-2 + y_2}{2} Multiply both sides by 2: 4=2+y24 = -2 + y_2 Add 2 to both sides: y2=6y_2 = 6

Thus, the coordinates of point QQ are (3,6)(-3, 6).

The correct answer is the last option: (3,6)(-3, 6).

Would you like a more detailed explanation or have any further questions?

Related questions:

  1. How do you find the midpoint of a line segment if both points are known?
  2. What is the distance formula between two points in a coordinate plane?
  3. How can you determine if three points are collinear using coordinates?
  4. What are the properties of a line segment's midpoint in geometry?
  5. How do you solve for one endpoint when the midpoint and the other endpoint are given?

Tip:

Always verify your answer by substituting the calculated point back into the midpoint formula to ensure correctness.

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Math Problem Analysis

Mathematical Concepts

Algebra
Geometry
Coordinate Geometry

Formulas

Midpoint formula: M = ((x1 + x2)/2, (y1 + y2)/2)

Theorems

Midpoint Theorem

Suitable Grade Level

Grades 7-10