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This module is from Elementary Algebra by Denny Burzynski and Wade Ellis, Jr.
Beginning with the graphical solution of systems, this chapter includes an interpretation of independent, inconsistent, and dependent systems and examples to illustrate the applications for these systems. The substitution method and the addition method of solving a system by elimination are explained, noting when to use each method. The five-step method is again used to illustrate the solutions of value and rate problems (coin and mixture problems), using drawings that correspond to the actual situation.This module contains the proficiency exam for the chapter "Systems of Linear Equations".
Proficiency exam
(
[link] ) A chemist needs 80 ml of an 18% acid solution. She has two acid solutions, A and B, to mix together to form the 80-ml solution. Acid solution A is 15% acid and acid solution B is 20% acid. How much of each solution should be used?
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(
[link] ) A parking meter contains 32 coins. If the meter contains only nickels and quarters, and the total value of the coins is
, how many of each type of coin are there?
17 nickels and 15 quarters
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(
[link] ) A person has $15,000 to invest. If he invests part at 8% and the rest at 12%, how much should he invest at each rate to produce the same return as if he had invested it all at 9%?
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Questions & Answers
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the Three stages of Auguste Comte
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Nuhu
shared beliefs, values, and practices
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what are the scientific method of sociology
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the process wherein people come to understand societal norms and expectations, to accept society's beliefs, and to be aware of societal values
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what are the agents of socialization
Antonio
Family
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I mean the definition
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ways of perceived deviance indifferent society
reasons of joining groups
SAM
to bring development to the nation at large
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entails of consultative and consensus building from others
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World first Sociologist?
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What is evolutionary model
Evolution models refer to mathematical and computational representations of the processes involved in biological evolution. These models aim to simulate and understand how species change over time through mechanisms such as natural selection, genetic drift, and mutation. Evolutionary models can be u
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shared standards of acceptable behavior by the group or appropriate behavior in a particular institution or those behaviors that are acceptable in a society
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examples of societal norms
Diamond
Discuss the characteristics of the research located within positivist and the interpretivist paradigm
what is Industrialisation
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Source:
OpenStax, Elementary algebra. OpenStax CNX. May 08, 2009 Download for free at http://cnx.org/content/col10614/1.3
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