Math Problem Statement

A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the given equation. Using this equation, find out the maximum amount of profit the company can make, to the nearest dollar.

y= -16x^2 + 124x + 110

Solution

To find the maximum profit, we need to find the vertex of the quadratic equation:

y=16x2+124x+110y = -16x^2 + 124x + 110

This equation represents a parabola that opens downwards (since the coefficient of x2x^2 is negative), meaning the vertex will give the maximum point.

Step 1: Find the x-coordinate of the vertex

The formula for the x-coordinate of the vertex of a quadratic equation ax2+bx+cax^2 + bx + c is:

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

Here, a=16a = -16 and b=124b = 124:

x=1242(16)=12432=3.875x = -\frac{124}{2(-16)} = \frac{124}{32} = 3.875

Step 2: Find the y-coordinate (maximum profit)

Now, substitute x=3.875x = 3.875 back into the equation to find yy:

y=16(3.875)2+124(3.875)+110y = -16(3.875)^2 + 124(3.875) + 110

Calculating step-by-step:

  1. (3.875)2=15.015625(3.875)^2 = 15.015625
  2. 16×15.015625=240.25-16 \times 15.015625 = -240.25
  3. 124×3.875=480.5124 \times 3.875 = 480.5

Thus,

y=240.25+480.5+110=350.25y = -240.25 + 480.5 + 110 = 350.25

The maximum profit is approximately $350.

Answer:

The maximum profit the company can make is $350.

Do you want further details or have any questions?

Here are 5 related questions to explore:

  1. How would the maximum profit change if the coefficient of x2x^2 were different?
  2. What does the selling price x=3.875x = 3.875 signify in a real-world context?
  3. How can the vertex form of a quadratic equation be used to find the maximum or minimum values?
  4. How does changing the constant term cc affect the maximum profit in a quadratic equation?
  5. What are other methods to find the maximum value of a quadratic equation?

Tip: When dealing with quadratic equations, always check if the parabola opens upwards or downwards to determine whether you're finding a maximum or minimum value.

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Math Problem Analysis

Mathematical Concepts

Algebra
Quadratic Functions
Optimization

Formulas

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

Theorems

Vertex Theorem for Quadratic Functions

Suitable Grade Level

Grades 9-12