Math Problem Statement

Determine which point from the specified set satisfies each system of equations. 1. y = 2x - 9, y = -4x + 3, Given points: (2, -5), (-3, -15), (1, -1)

Solution

The task in the image is asking to determine which point from the specified set satisfies each system of equations.

Here is the first system:

y=2x9y = 2x - 9 y=4x+3y = -4x + 3

Given the points: (2, -5), (-3, -15), and (1, -1), you need to check which of these points satisfies both equations.

Steps for solution:

  1. Substitute the x and y values of each point into both equations to check for consistency.

For point (2, -5):

Substitute x = 2 and y = -5 into both equations:

  • For y=2x9y = 2x - 9: 5=2(2)9    5=49    5=5(True)-5 = 2(2) - 9 \implies -5 = 4 - 9 \implies -5 = -5 \quad \text{(True)}

  • For y=4x+3y = -4x + 3: 5=4(2)+3    5=8+3    5=5(True)-5 = -4(2) + 3 \implies -5 = -8 + 3 \implies -5 = -5 \quad \text{(True)} So, (2, -5) satisfies both equations.

For point (-3, -15):

Substitute x = -3 and y = -15 into both equations:

  • For y=2x9y = 2x - 9: 15=2(3)9    15=69    15=15(True)-15 = 2(-3) - 9 \implies -15 = -6 - 9 \implies -15 = -15 \quad \text{(True)}

  • For y=4x+3y = -4x + 3: 15=4(3)+3    15=12+3    15=15(False)-15 = -4(-3) + 3 \implies -15 = 12 + 3 \implies -15 = 15 \quad \text{(False)} So, (-3, -15) does not satisfy the second equation.

For point (1, -1):

Substitute x = 1 and y = -1 into both equations:

  • For y=2x9y = 2x - 9: 1=2(1)9    1=29    1=7(False)-1 = 2(1) - 9 \implies -1 = 2 - 9 \implies -1 = -7 \quad \text{(False)}

  • For y=4x+3y = -4x + 3: 1=4(1)+3    1=4+3    1=1(True)-1 = -4(1) + 3 \implies -1 = -4 + 3 \implies -1 = -1 \quad \text{(True)} So, (1, -1) does not satisfy the first equation.

Conclusion:

The point (2, -5) satisfies both equations.

Would you like further details or have any questions about the solution?

Here are some related questions:

  1. How do you solve a system of linear equations by substitution?
  2. What is the definition of a system of linear equations?
  3. How do you determine if a point is a solution to a system of equations?
  4. What happens if no points satisfy the system of equations?
  5. How can you solve a system of equations using graphing?

Tip: When solving systems of linear equations, always check the validity of each point by substituting into both equations to confirm if they satisfy the system.

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Linear Equations
Systems of Linear Equations
Substitution Method

Formulas

y = 2x - 9
y = -4x + 3

Theorems

Solution to a system of linear equations is a point that satisfies all equations in the system.

Suitable Grade Level

Grades 7-9