By Rodney David Driver
Why Math? is designed for a "general schooling" arithmetic path. It is helping improve the fundamental mathematical literacy now mostly demanded of liberal arts scholars. Requiring just a little history wisdom of algebra and geometry - not more than the minimal front necessities at most schools - the ebook emphasizes quantitative reasoning and demanding considering for actual existence difficulties. In a concrete and proper means, utilizing broad motivation from daily difficulties, Why Math? exhibits what you may do with ordinary arithmetic and the way to do it.
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PROBLEMS 1. Kilroy is 5 years older than Rupert, and the sum of their ages is 37 years. How old is each? 2. 00 worth in pounds? 3. Suppose you have $10,000 available for the down payment on a house, and suppose the bank requires that the down payment be at least 20% of the selling price. What limitation does this impose on the price of a house you can buy? 4. 15, what was the list price of the item? 5. A 16-ounce package of cookies is said to contain "23% more than the regular size" package. How many ounces does the "regular" size contain?
2) Now express the total years of experience of father and son in two different ways. Note that x + 4 = number of years experience of the father. So x + (x + 4) = total number of years experience of both. But this was given as 25. So x + (x + 4) = 25. (3) This equation is easily solved for x as follows: 2x + 4 = 25 :. 5. 5 years. 5 = 4 years more experience than his son. Example 2. S. S. money? ) Solution. Once again the steps of the outline are identified. S. dollars of one Canadian dollar. S.
10 CHAPTER 4 Elementary Equations Many day-to-day problems can be solved most easily with the aid of a little elementary algebra. Examples in this chapter will treat currency exchanges, speed and distance problems, mixtures, levers, and conversions between Celsius and Fahrenheit. In most cases, one must first translate some given information into algebraic language, then solve the resulting algebraic equation(s). The first steptranslating the "word problem" into algebraic form-seems to give many students "fits" of anxiety.
Why Math? by Rodney David Driver