Essentials of Algebra for Secondary SchoolsD.C. Heath & Company, 1897 - 411 σελίδες |
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Σελίδα 1
... means of Symbols . 2. Symbols which represent Numbers . The symbols generally employed to represent numbers are the figures of Arithmetic and the letters of the Alphabet . Known Numbers are usually represented by the first letters of ...
... means of Symbols . 2. Symbols which represent Numbers . The symbols generally employed to represent numbers are the figures of Arithmetic and the letters of the Alphabet . Known Numbers are usually represented by the first letters of ...
Σελίδα 9
... means that he has debts or liabilities to the amount of $ 100 . - Again , in the thermometer , we may indicate temperatures above zero by the sign + , and temperatures below zero by the sign ; for example , + 25 ° means 25 ° above zero ...
... means that he has debts or liabilities to the amount of $ 100 . - Again , in the thermometer , we may indicate temperatures above zero by the sign + , and temperatures below zero by the sign ; for example , + 25 ° means 25 ° above zero ...
Σελίδα 26
... means the same as + ( a − b ) , and — a − b the same as ( a - b ) . - - 43. 1. Remove the parentheses from 2a - 3b- ( 5 a − 4b ) + ( 4 a − b ) . - By the rules of § 41 , the expression becomes 2a - 3b5a + 4 b + 4 a − b = a , Ans ...
... means the same as + ( a − b ) , and — a − b the same as ( a - b ) . - - 43. 1. Remove the parentheses from 2a - 3b- ( 5 a − 4b ) + ( 4 a − b ) . - By the rules of § 41 , the expression becomes 2a - 3b5a + 4 b + 4 a − b = a , Ans ...
Σελίδα 151
... means of the artifice which is employed in the following example . u + x + y = 6 . ( 1 ) x + y + z = 7 . 2. Solve the equations ( 2 ) y + z + u = = 8 . ( 3 ) z + u + x = 9 . ( 4 ) Adding , 3u + 3x + 3y + 3 z = 30 . Dividing by 3 , u + x ...
... means of the artifice which is employed in the following example . u + x + y = 6 . ( 1 ) x + y + z = 7 . 2. Solve the equations ( 2 ) y + z + u = = 8 . ( 3 ) z + u + x = 9 . ( 4 ) Adding , 3u + 3x + 3y + 3 z = 30 . Dividing by 3 , u + x ...
Σελίδα 249
... means of the rules for quadratics . 276. CASE I. When each equation is in the form 3x2 + 4y2 76 . = 3y2 - 11a24 . 9 x2 + 12 y2 = 228 . ax2 + by2 : = C. 1. Solve the equations Multiplying ( 1 ) by 3 , Multiplying ( 2 ) by 4 , 12 y2 ...
... means of the rules for quadratics . 276. CASE I. When each equation is in the form 3x2 + 4y2 76 . = 3y2 - 11a24 . 9 x2 + 12 y2 = 228 . ax2 + by2 : = C. 1. Solve the equations Multiplying ( 1 ) by 3 , Multiplying ( 2 ) by 4 , 12 y2 ...
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a²b a²b² a²x² a³b ab² ab³ Algebra arithmetic means arithmetic progression ax² binomial cent change the sign coefficient cologarithm common factor cube root decimal degree denominator digits dimes Divide dividend divisor equal EXAMPLES exponent Extracting the square Find the H. C. F. Find the number Find the value following rule geometric geometric progression Hence highest common factor last term less logarithm m²n mantissa miles an hour monomial Multiplying negative number Note number of dollars number of terms partial fractions polynomial positive integer positive number quadratic equation quotient radical sign ratio remainder result second term Solve the equation Solve the following square root Subtracting Transposing trial-divisor unknown quantities Whence x²y xy² xy³
Δημοφιλή αποσπάσματα
Σελίδα 276 - In any proportion,, the terms are in proportion by Composition ; that is, the sum of the first two terms is to the first term as the sum of the last two terms is to the third term.
Σελίδα 55 - ... the square of the second. In the second case, we have (a — 6)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.
Σελίδα 128 - At what time between 3 and 4 o'clock are the hands of a watch opposite to each other ? Let x = the number of minute-spaces passed over by the minutehand from 3 o'clock to the required time.
Σελίδα 37 - 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.
Σελίδα 277 - In a series of equal ratios, any antecedent is to its consequent, as the sum of all the antecedents is to the sum of all the consequents. Let a: 6 = c: d = e :/. Then, by Art.
Σελίδα 133 - A person has a hours at his disposal. How far may he ride in a coach which travels b miles an hour, so as to return home in time, walking back at the rate of с miles an hour ? 43.
Σελίδα 18 - From §§36 and 37, we have the following rule: To subtract one number from another, change the sign of the subtrahend, and add the result to the minuend.
Σελίδα 275 - If the product of two quantities is equal to the product of two others, one pair may be made the extremes, and the other pair the means, of a proportion. Let ad = ос.
Σελίδα 136 - If necessary, multiply the given equations by such numbers as will make the coefficients of one of the unknown quantities in the resulting equations of equal absolute value.
Σελίδα 45 - A term may be transposed from one member of an equation to the other by changing its sign.