Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 1 - Foundations for Algebra - 1-8 An Introduction to Equations - Practice and Problem-Solving Exercises: 49

Answer

2004

Work Step by Step

To find the year in which about 22 million bicycles were sold, substitute 22 for y in the equation. $22=0.3x+15$ Create a table to solve the equation. The table will list possible values of x and the result when that value for x is used in the equation. Look for the result closest to 22. $\underline x\ \ \ \ \underline{0.3x+15}$ $10\ \ \ \ \ \ 18$ $20\ \ \ \ \ \ 21$ $21\ \ \ \ \ \ 21.3$ $22\ \ \ \ \ \ 21.6$ $23\ \ \ \ \ \ 21.9\longrightarrow$ 23 years after the initial date is the nearest to 22 million $24\ \ \ \ \ \ 22.2$ To find the actual year, you must add 1981 to the number of years since 1981. $1981+23=2004$
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