Concept explainers
a.
To write an equation and find the amount spent on each CD
a.
Answer to Problem 47E
$9.5
Explanation of Solution
Given:
Cost spent on 4 CDs = $30.40
Each CD costs the same amount and is on sale for 80% of the original price.
Calculation:
Let x be the original cost of 1 CD.
80% of one CD = 80% of x = 0. 8x
The discounted price of CD = 0. 8x
Thus, the cost of 4 discounted CDs = $30.40
Conclusion:
Therefore, the cost of each CD is $9.5.
b.
To find if 3 CDs can be bought with $25.
b.
Answer to Problem 47E
No
Explanation of Solution
Given:
No CDs are for sale the next day.
Cost remaining = $25
From subpart (a),
Cost of one CD is $9.5
Calculation:
The number of CDs that can be bought with $25 is,
Thus, 2 CDs can be bought approximately.
Conclusion:
Therefore, only two CDs can be bought with $25.
Chapter 1 Solutions
BIG IDEAS MATH Algebra 1: Common Core Student Edition 2015
- 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