Concept explainers
a.
To calculate: The number of choices for the first digit. Also, after the first digit.
a.
Answer to Problem 11PPE
The choices for first digit is 8 and for other digits it is 10.
Explanation of Solution
Given information:
A seven-digit telephone number can begin with nay digit except 0 or 1. There are no restrictions on digits after the first digit.
Formula used:
For any positive integer
Calculation:
According to the question,
The number of digits are -
This implies we have total
Excluding
For second digit we have 10 choices and the rest of numbers.
Hence, total choices for first digit is 8 and for further numbers it is 10.
b.
To calculate: The number of ways seven-digit telephone numbers are possible.
b.
Answer to Problem 11PPE
The number of wyas are
Explanation of Solution
Given information:
A seven-digit telephone number can begin with nay digit except 0 or 1. There are no restrictions on digits after the first digit.
Formula used:
For any positive integer
Calculation:
According to the question,
The number of digits are -
This implies we have total
Excluding
For second digit we have 10 choices and the rest of numbers.
Therefore ,
Hence, the number of ways are
Chapter 12 Solutions
High School Math 2015 Common Core Algebra 1 Student Edition Grade 8/9
Additional Math Textbook Solutions
Intermediate Algebra (7th Edition)
College Algebra with Modeling & Visualization (5th Edition)
Intermediate Algebra for College Students (7th Edition)
College Algebra (6th Edition)
College Algebra
College Algebra in Context with Applications for the Managerial, Life, and Social Sciences (5th Edition)
- 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