Concept explainers
Tofind:The speed of the plane in still air and the speed of the wind.
Answer to Problem 15P
The rate at still air is
Explanation of Solution
Given:
The
In return it took only
Concept used:
Speed and the rate here has same meaning.
In the elimination method:
Either add or subtract equation to get an equation in one variable.
When the coefficients in one variable are opposites then add the equations to eliminate the variable and when the coefficients of one variable are equal and subtract the equation to eliminate a variable.
Calculation:
Let
Then the plane’s rate with the wind is
Using formula:
Dividing both side by
Similarly,
Adding the equation
Hence, the rate at still air is
Chapter 9 Solutions
Algebra: Structure And Method, Book 1
Additional Math Textbook Solutions
College Algebra (6th Edition)
College Algebra (5th Edition)
Elementary Algebra: Concepts and Applications (10th Edition)
College Algebra (10th Edition)
Linear Algebra with Applications (9th Edition) (Featured Titles for Linear Algebra (Introductory))
- Algebra and Trigonometry (6th Edition)AlgebraISBN:9780134463216Author:Robert F. BlitzerPublisher:PEARSONContemporary Abstract AlgebraAlgebraISBN:9781305657960Author:Joseph GallianPublisher:Cengage LearningLinear Algebra: A Modern IntroductionAlgebraISBN:9781285463247Author:David PoolePublisher:Cengage Learning
- Algebra And Trigonometry (11th Edition)AlgebraISBN:9780135163078Author:Michael SullivanPublisher:PEARSONIntroduction to Linear Algebra, Fifth EditionAlgebraISBN:9780980232776Author:Gilbert StrangPublisher:Wellesley-Cambridge PressCollege Algebra (Collegiate Math)AlgebraISBN:9780077836344Author:Julie Miller, Donna GerkenPublisher:McGraw-Hill Education