Math Problem Statement
Solution
The problem describes a rectangle where the length is 3 yards less than twice the width, and the area of the rectangle is 14 square yards. We need to find the dimensions (length and width) of the rectangle.
Let:
- represent the width of the rectangle.
- represent the length of the rectangle.
From the problem, we are given two relationships:
- The length is 3 yards less than twice the width, so:
- The area of the rectangle is 14 square yards, and the area of a rectangle is given by . Therefore:
Substitute the expression for from the first equation into the second equation: Expand and solve for :
This is a quadratic equation. We can solve it using the quadratic formula: Simplify:
So, can be: or
Since the width cannot be negative, yards.
Now, using the first equation to find the length:
Therefore, the dimensions of the rectangle are:
- Width: yards
- Length: yards
Would you like more details, or do you have any questions?
Here are five related questions to explore:
- How would you check the solution by calculating the area again?
- What would happen if the length was 3 yards more than twice the width?
- Can you solve the quadratic equation using factoring instead of the quadratic formula?
- How would the solution change if the area was different but the length relation stayed the same?
- What are other possible ways to describe the dimensions of the rectangle?
Tip: Always check for possible extraneous solutions, especially when solving quadratic equations, as some results might not be valid for the context (e.g., negative dimensions).
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Math Problem Analysis
Mathematical Concepts
Algebra
Quadratic Equations
Geometry
Formulas
Area of a rectangle: length × width
Quadratic equation formula: ax^2 + bx + c = 0
Theorems
Quadratic formula
Suitable Grade Level
Grades 8-10
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