Math Problem Statement
A number is equal to twice a smaller number plus 3. The same number is equal to twice the sum of the smaller number and 1. How many solutions are possible for this situation? Infinitely many solutions exist because the two situations describe the same line. Exactly one solution exists because the situation describes two lines that have different slopes and different y-intercepts. No solutions exist because the situation describes two lines that have the same slope and different y-intercepts. Exactly one solution exists because the situation describes two lines with different slopes and the same y-intercept.
Solution
Let's analyze the given statements mathematically.
Let the number be , and the smaller number be .
First condition:
Second condition:
Simplify the second equation:
Now, let's compare the two equations:
- From Equation 1:
- From Equation 2:
Analysis:
The two equations and have the same slope (both have a coefficient of ), but they have different y-intercepts (3 and 2, respectively).
Since the lines are parallel and have different y-intercepts, they will never intersect. This implies that there is no solution for the system of equations.
Conclusion:
The correct answer is:
No solutions exist because the situation describes two lines that have the same slope and different y-intercepts.
Would you like further details or have any other questions?
Here are some related questions you might consider:
- What happens if the lines have the same slope and the same y-intercept?
- How do you determine if two lines are parallel?
- Can two lines with different slopes ever be parallel?
- What is the general form of a linear equation?
- How do you find the point of intersection between two lines?
- What is the significance of the y-intercept in a linear equation?
- Can two lines with the same slope and different y-intercepts ever intersect?
- How can you visually represent the relationship between two linear equations?
Tip: When analyzing systems of linear equations, always check both the slopes and y-intercepts to determine the number of solutions.
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Math Problem Analysis
Mathematical Concepts
Linear Equations
Parallel Lines
Systems of Equations
Formulas
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Theorems
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Suitable Grade Level
Grades 7-9