## Bradbury's Elementary Algebra |

### From inside the book

Results 1-5 of 19

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**RATIO**AND PROPORTION 207 SECTION XXII . ARITHMETICAL PROGRESSION 215 SECTION XXIII . GEOMETRICAL PROGRESSION 225 SECTION XXIV . MISCELLANEOUS EXAMPLES • 236 SECTION XXV . LOGARITHMS 253 UNIV . OF ELEMENTARY ALGEBRA . SECTION I ... Page 86

... . Since the relations between quantities in Algebra are often expressed in the form of a proportion , we intro- duce here the necessary definitions . 104.

... . Since the relations between quantities in Algebra are often expressed in the form of a proportion , we intro- duce here the necessary definitions . 104.

**RATIO**is the relation of one quantity to another 86 ELEMENTARY ALGEBRA . Page 87

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**ratios**. tities are proportional when the**ratio**of the first to the second is equal to the**ratio**of the third to the fourth . The equality of two**ratios**is indicated by the sign of equality ( = ) or by four dots ( : :) . Thus , à : b ... Page 96

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**ratio**of 10 : 7 . 31. Divide a into two parts which shall be in the**ratio**of b : c . ab a c Ans . and b + c b + c 32. What number is that the sum of whose fourth 96 ELEMENTARY ALGEBRA . Page 97

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**ratio**, 10 x + ( 9 — x ) — 9 x + 9 : - = the number ; and when the order of the figures is inverted , 10 ( 9x ) + x = 90-9x = the resulting number . Therefore Or Whence and 9x + 9 + 27 = 90 18x54 - 9 x x = 3 , the left - hand figure ...### Other editions - View all

Bradbury's Elementary Algebra William Frothingham Bradbury,James Howard Eaton No preview available - 2016 |

Bradbury's Elementary Algebra: Designed for the Use of High Schools and ... William Frothingham Bradbury No preview available - 2015 |

Bradbury's Elementary Algebra: Designed for the Use of High Schools and ... William Frothingham Bradbury No preview available - 2019 |

### Common terms and phrases

a²x² Algebra arithmetical mean arithmetical progression binomial binomial theorem cents coefficient cologarithm common difference completing the square cube root Divide dividend division equal Expand extracting the square figures Find the cube Find the factors Find the fourth Find the greatest Find the least Find the square Find the sum Find the value Find two numbers geometrical progression greatest common divisor Hence horse improper fraction integral quantity least common multiple less logarithm lowest terms minus monomial Multiply NOTE number of terms obtain OPERATION polynomial proportion quadratic equation quan quotient radical sign ratio Reduce x² reduced gives remainder RULE second term simplest form Solve the equation square root Substituting this value subtracted Theorem third tities Transposing trial divisor twice unknown quantity x² y² yards

### Popular passages

Page 78 - Now .} of f- is a compound fraction, whose value is found by multiplying the numerators together for a new numerator, and the denominators for a new denominator.

Page 40 - Divide the first term of the dividend by the first term of the divisor, and write the result as the first term of the quotient. Multiply the whole divisor by the first term of the quotient, and subtract the product from the dividend.

Page 100 - D. The distance from A to D is 34 miles ; the distance from A to B is to the distance from C to D as 2 to 3 ; and £ of the distance from A to B, added to one half the distance from C to D, is three times the distance from .B to C.

Page 44 - ... the square of the second. In the second case, we have (a — &)2 = a2 — 2 ab + b2. (2) That is, the square of the difference of two quantities is equal to the square of the first, minus twice the product of the two, plus the square of the second.

Page 43 - I. The square of the sum of two quantities is equal to the square of the first, plus twice the product of the first by the second, plus the square of the second.

Page 87 - PROPORTION when the ratio of the first to the second is equal to the ratio of the second to the third.

Page 83 - TRANSPOSITION is the changing of terms from one member of an equation to the other, without destroying the equality. The object of transposition is to bring all the unknown terms into one member and all the known into the other, BO that the unknown may become known.

Page 212 - Hence -,- = -76" dn that is a" : b" = c" : dn THEOREM IX. 23 1 If any number of quantities are proportional, any antecedent is to its consequent as the sum of all the antecedents is to the sum of all the consequents. Let a : b = c : d...

Page 209 - Conversely, if the product of two quantities is equal to the product of two other quantities, the first two may be made the extremes, and the other two the means of a proportion.

Page 251 - B had during the whole time; and at the same rate as before B would reach Springfield in 5f days. How far from Boston did they meet? Ans. 42 miles. 163. The product of two numbers is 90 ; and the difference of their cubes is to the cube of their difference as 13 : 3. What are the numbers ? 164. A and B start together from the same place and travel in the same direction. A travels the first day 25 kilometers, the second 22, and so on, travelling each day 3 kilometers less than on the preceding day,...