Math Problem Statement

Do number 10, and for the let statement just show the rectangle not words.

Do number 10, and for the let statement just show the rectangle not words.

Solution

from PIL import Image

Load the image to confirm the user-uploaded file path and its dimensions

image_path = "/mnt/data/1732473406007yh056734.jpg" image = Image.open(image_path) image.show()successFor question 10, let’s solve step by step:

  1. Rectangle Information:

    • Perimeter P=46cmP = 46 \, \text{cm}
    • Area A=120cm2A = 120 \, \text{cm}^2
    • Let the length be ll and the width be ww.
  2. Forming equations:

    • From the perimeter: 2l+2w=462l + 2w = 46, which simplifies to: l+w=23(1)l + w = 23 \quad \text{(1)}
    • From the area: lw=120(2)l \cdot w = 120 \quad \text{(2)}
  3. Substitute ll from equation (1) into equation (2): From equation (1): l=23wl = 23 - w. Substitute into equation (2): (23w)w=120(23 - w) \cdot w = 120 Simplify: 23ww2=12023w - w^2 = 120 Rearrange into standard quadratic form: w223w+120=0w^2 - 23w + 120 = 0

  4. Solve the quadratic equation: Using the quadratic formula: w=b±b24ac2aw = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a} Here, a=1a = 1, b=23b = -23, and c=120c = 120. Substitute: w=(23)±(23)24(1)(120)2(1)w = \frac{-(-23) \pm \sqrt{(-23)^2 - 4(1)(120)}}{2(1)} w=23±5294802w = \frac{23 \pm \sqrt{529 - 480}}{2} w=23±492w = \frac{23 \pm \sqrt{49}}{2} w=23±72w = \frac{23 \pm 7}{2}

    Two solutions: w=23+72=15orw=2372=8w = \frac{23 + 7}{2} = 15 \quad \text{or} \quad w = \frac{23 - 7}{2} = 8

  5. Find ll: If w=15w = 15, then l=2315=8l = 23 - 15 = 8.
    If w=8w = 8, then l=238=15l = 23 - 8 = 15.

  6. Final dimensions: The rectangle's dimensions are 15cm×8cm15 \, \text{cm} \times 8 \, \text{cm}.

Let me know if you want further clarifications or a graph of this quadratic!


Questions for further exploration:

  1. How can the quadratic formula be derived?
  2. What other methods can solve quadratic equations besides factoring or the quadratic formula?
  3. Can the relationship between area and perimeter be generalized for any rectangle?
  4. How do the roots of the quadratic equation relate to the dimensions of the rectangle?
  5. What would change in this problem if the perimeter or area were given in a different unit?

Tip:

Always check both roots of a quadratic equation to ensure they make sense in the context of the problem.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Equations
Geometry

Formulas

Perimeter formula for rectangle: P = 2l + 2w
Area formula for rectangle: A = lw
Quadratic equation formula: ax^2 + bx + c = 0

Theorems

Quadratic formula

Suitable Grade Level

Grades 8-10