Math Problem Statement

The production cost ($C) of a necklace is given by C= 2x²- 40x + 300,where x is the daily number of necklaces produced. Find the minimum production cost of a necklace and the corresponding daily number of necklaces produced.

Solution

The production cost C(x)=2x240x+300C(x) = 2x^2 - 40x + 300 represents a quadratic function. Since the coefficient of x2x^2 is positive (2), the parabola opens upwards, meaning it has a minimum point.

To find the minimum production cost, we need to determine the vertex of the parabola. For a quadratic function in the form ax2+bx+cax^2 + bx + c, the x-coordinate of the vertex is given by:

x=b2ax = \frac{-b}{2a}

In this case:

  • a=2a = 2
  • b=40b = -40

Substituting into the vertex formula:

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Optimization

Formulas

Vertex formula: x = -b / 2a
Quadratic equation: ax^2 + bx + c = 0

Theorems

Vertex of a Parabola

Suitable Grade Level

Grades 9-10