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- Elementary algebra
- Roots, radicals, and square root
- Proficiency exam
This module is from Elementary Algebra by Denny Burzynski and Wade Ellis, Jr.
The distinction between the principal square root of the number x and the secondary square root of the number x is made by explanation and by example. The simplification of the radical expressions that both involve and do not involve fractions is shown in many detailed examples; this is followed by an explanation of how and why radicals are eliminated from the denominator of a radical expression. Real-life applications of radical equations have been included, such as problems involving daily output, daily sales, electronic resonance frequency, and kinetic energy.This module contains the proficiency exam for the chapter "Roots, Radicals, and Square Root Equations".
Proficiency exam
For the following problems, simplify each of the square root expressions.
For the following problems, solve the equations.
(
[link] ) At a small business, the number of monthly sales
is approximately related to the number of employees
by
(a) Determine the approximate number of sales if the number of employees is 39.
(b) Determine the approximate number of employees if the number of sales is 224.
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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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