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2.09 Ratio and Proportion Intermediate Algebra: One Step at a Time. Page 216 - 219: #6 Dr. Robert J. Rapalje Seminole State College of Florida Sanford, FL 32773
To see Section 2.09, with explanations, examples, exercises, and answers, click here!
For explanations, examples, exercises, and answers from Basic Algebra, click here!
At first glance, you
may think, “Word Problems!!” However, let me assure you that these are NOT
word problems! They are just “problems with words!” They are very easy
problems that need almost NO explanation. They are useful to everyday life,
and there is nothing difficult about this page. Just set up a proportion
p. 218. # 6. If on the interstate it takes 3 hours to travel 200 miles, how long will it take to travel 750 miles at this rate? Solution: Set up a proportion of either hours over miles, or miles over hours. It doesn’t matter which way you set it up, as long as you do both ratios the same. In either method, begin by letting x = number of hours.
First Method:
Cross multiply:
Second Method:
Cross multiply:
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