Showing posts with label elementary algebra. Show all posts
Showing posts with label elementary algebra. Show all posts

Wednesday, June 26, 2013

Distance and Midpoint Formulas

In this section we will review the distance and midpoint formulas.
Notice that the distance formula results in a real number and that the midpoint formula results in an ordered pair.

[ Interactive: Distance and Midpoint ]

Given two points find the distance and midpoint between them.
   

   
   
   
Video Lessons:
 
Use the distance and/or midpoint formulas to solve the following.

Example: If the diameter of a circle is defined by the two points (-3, 4) and (7, 4), find the center and radius of the circle. (Hint: diameter = 2r)
Example: Find the area of a circle given center (-3, 3) and point (3, 3) on the circle.
   
Video Examples on YouTube:





 
YouTube Example: Find the coordinates of an endpoint given the other endpoint and the midpoint.
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Sunday, May 5, 2013

Elementary Algebra (Algebra 1) Sample Exams

A complete set of sample exams covering topics found in the first 7 chapters of the online textbook Elementary Algebra.



You will find mobile friendly solutions as well as links to printable copies in pdf format. Please feel free to copy and paste anything you find here into your LMS.

Sunday, April 21, 2013

Elementary Algebra Exam #3

Click on the 10 question exam covering topics in chapters 5 and 6. Give yourself one hour to try all of the problems and then come back and check your answers.



10. The length of a rectangle is 4 centimeters less than twice its width. The area is 96 square centimeters. Find the length and width. (Set up an algebraic equation then solve it)

 
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Saturday, February 9, 2013

Elementary Algebra Exam #1

Click on the 10 question exam covering topics in chapters 1 and 2. Give yourself one hour to try all of the problems and then come back and check your answers.


Simplify:



Solve:



Solve and graph all solutions on a number line.




10. The perimeter of a rectangle is 54 feet.  If the length is 3 feet less than twice the width, find the dimensions of the rectangle. (Set up an algebraic equation and use it to solve this problem.)
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