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MATH - Age Word Problem

by KIKI
(Chicago,IL USA)











































1. develop a mathematical model

2. Solve the equations for the unknown values.

Instructions are given in Week One.

List your name and current age, and the names and ages of two other people. One person should be older than you, and the other person should be younger.

At the time you were born, how old was the oldest person?

Write an equation which can be used to determine what both ages will be when the sum of the older person’s age and your age add up to 150.

Explain the reasoning which helped you develop your equation.

Solve for those future ages.

Do the ages add up to 150?

How old were you when the youngest person was born?

Write an equation which describes how old you will be when you are 3 times as old as the younger person.

Explain your reasoning.

Solve for both ages using your equation.

Comments for MATH - Age Word Problem

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Sep 22, 2011
Age Word Problem
by: Staff

The question:

by KIKI
(Chicago, IL USA)


This Discussion will help us learn to develop our own mathematical models, write down the equations and then solve the equations for unknown values.

Refer back to Week One and use the names and ages of yourself and the other two people you selected in this week’s discussion.

How many years older was the person older than you when you were born?

Write an equation that models how old in years each of you will be, when your ages add up to 150 years old.

For example, if the eldest person was one year older than you, then the equation would be: x + (x+1) = 150.

In this case your age is "x" and the older person's age is "(x+1)."

Explain the reasoning which helped you develop your equation.

Solve for your future ages.

Are your answers reasonable, do they add up to 150?

In years, how old were you when the youngest person was born?

Write an equation which models how old, in years, you will be when you are 3 times as old as the younger person.

Explain the reasoning which helped you develop your equation.

Solve for your ages, when you are 3 times as old. Are your answers reasonable?


The answer:

Hi KIKI,

You forgot to include the names and ages of yourself and the other two people you selected in this week’s discussion. I need that information to complete the problem.

You can add a comment to this page with that information.

Otherwise, here is a link to a comment page for the same question I found in our achieves . . . but with different names and ages.


(1) If your browser is Firefox, click the following link to VIEW the solution; or if your browser is Chrome, Internet Explorer, Opera, or Safari (2A) highlight and copy the link, then (2B) paste the link into your browser Address bar & press enter:

Use the Backspace key to return to this page:

http://www.solving-math-problems.com/math-age-word-problem.html




Thanks for writing.


Staff
www.solving-math-problems.com


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