Algebra Demystified: A Self Teaching Guide by Rhonda Huettenmueller PDF
By Rhonda Huettenmueller
* Explains the best way to comprehend algebra with no need a mathematical history
* makes use of useful examples and genuine info
* comprises a complete part dedicated to note difficulties and fractions
Read or Download Algebra Demystified: A Self Teaching Guide PDF
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Additional info for Algebra Demystified: A Self Teaching Guide
Let x ¼ width (in the given units). 3x ¼ length (in the given units) Jack is two-thirds as tall as Jill. Let x ¼ Jill’s height (in the given units). 2 3x ¼ Jack’s height (in the given units) From 6 pm to 6 am the temperature dropped 30 degrees. Let x = temperature (in degrees) at 6 pm. x À 30 ¼ temperature (in degrees) at 6 am One-eighth of an employee’s time is spent cleaning his work station. Let x ¼ the number of hours he is on the job. 1 8x ¼ the number of hours he spends cleaning his work station $10,000 was deposited between two savings accounts, Account A and Account B.
13. (b) (c) (d) (d) 2. 6. 10. 14. (a) (d) (c) (a) 3. 7. 11. 15. (d) (b) (c) (b) 4. 8. 12. 16. (b) (a) (a) (d) This page intentionally left blank. CHAPTER 2 Introduction to Variables A variable is a symbol for a number whose value is unknown. A variable might represent quantities at diﬀerent times. ’’ The value of your earnings varies depending on the number of hours worked. If an equation has one variable, we can use algebra to determine what value the variable is representing. Variables are treated like numbers because they are numbers.
One way is to add the whole numbers then add the fractions. CHAPTER 1 Fractions À Á À Á À Á 4 23 þ 3 12 ¼ 4 þ 23 þ 3 þ 12 ¼ ð4 þ 3Þ þ 23 þ 12 À Á ¼ 7 þ 46 þ 36 ¼ 7 þ 76 ¼ 7 þ 1 þ 16 ¼ 8 16 The other way is to convert the mixed numbers into improper fractions then add. 4 23 þ 3 12 ¼ 14 7 28 21 49 þ ¼ þ ¼ ¼ 8 16 3 2 6 6 6 Practice 1: 2 37 þ 1 12 5 2: 2 16 þ 1 11 12 3: 4 56 þ 1 23 4: 3 49 À 1 16 5: 2 34 þ 56 6: 4 23 þ 2 15 1 7: 5 12 À 3 38 Solutions 1: 2 37 þ 1 12 ¼ 17 3 34 21 55 þ ¼ þ ¼ ¼ 3 13 14 7 2 14 14 14 5 2: 2 16 þ 1 11 12 ¼ 37 23 111 92 203 þ ¼ þ ¼ ¼ 4 11 48 16 12 48 48 48 3: 4 56 þ 1 23 ¼ 29 5 29 10 39 13 þ ¼ þ ¼ ¼ ¼ 6 12 6 3 6 6 6 2 4: 3 49 À 1 16 ¼ 31 7 62 21 41 5 À ¼ À ¼ ¼ 2 18 9 6 18 18 18 5: 2 34 þ 56 ¼ 11 5 33 10 43 7 þ ¼ þ ¼ ¼ 3 12 4 6 12 12 12 27 CHAPTER 1 Fractions 28 6: 4 23 þ 2 15 ¼ 14 11 70 33 103 þ ¼ þ ¼ ¼ 6 13 15 3 5 15 15 15 61 27 122 81 41 À ¼ À ¼ ¼ 1 17 24 12 8 24 24 24 When multiplying mixed numbers ﬁrst convert them to improper fractions, and then multiply.
Algebra Demystified: A Self Teaching Guide by Rhonda Huettenmueller