Elementary Algebra RevisedAmerican book Company, 1913 - 447 páginas |
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Página 76
... feet ? 40. If a man is now x + 1 years old , how many years ago was he 30 years old ? How many years must pass before he will be 50 years old ? When was he x- -1 years old ? When will he be 2x years old ? PROBLEMS LEADING TO LINEAR ...
... feet ? 40. If a man is now x + 1 years old , how many years ago was he 30 years old ? How many years must pass before he will be 50 years old ? When was he x- -1 years old ? When will he be 2x years old ? PROBLEMS LEADING TO LINEAR ...
Página 88
... feet , and the constant ( # ) in the formula C = 2 πR being 3.1416 - . - · 7. Find the area ( S ) of a circle whose radius ( R ) is 4 feet , the constant ( 7 ) in the formula S - = TR2 being 3.1416 8. With the formula of Example 7 ...
... feet , and the constant ( # ) in the formula C = 2 πR being 3.1416 - . - · 7. Find the area ( S ) of a circle whose radius ( R ) is 4 feet , the constant ( 7 ) in the formula S - = TR2 being 3.1416 8. With the formula of Example 7 ...
Página 156
... feet , the area of the field would be increased by 800 square feet . If the length is now 10 feet more than the width , what are the dimensions of the field ? Let Then and x = the width of the field in feet . the length of the field in feet ...
... feet , the area of the field would be increased by 800 square feet . If the length is now 10 feet more than the width , what are the dimensions of the field ? Let Then and x = the width of the field in feet . the length of the field in feet ...
Página 157
... feet more , and whose width is 12 feet less , than the side of this particular square . Find the dimensions of the rectangle . 19. The length of a certain rectangle is 12 feet greater than the width . If each dimension is increased by 3 ...
... feet more , and whose width is 12 feet less , than the side of this particular square . Find the dimensions of the rectangle . 19. The length of a certain rectangle is 12 feet greater than the width . If each dimension is increased by 3 ...
Página 163
... feet in circumference , and the rear wheel n feet in circumference . How far has the wagon gone when the rear wheel has made r revolutions less than the front wheel ? 10. A and B can together build a barn in r days , B and C the same ...
... feet in circumference , and the rear wheel n feet in circumference . How far has the wagon gone when the rear wheel has made r revolutions less than the front wheel ? 10. A and B can together build a barn in r days , B and C the same ...
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Términos y frases comunes
a²x a²x² a³b algebraic expression arithmetical arithmetical progression ax² binomial cents coefficient consecutive numbers consecutive odd numbers cube decimal difference digits Divide dividend division divisor dollars Exercise exponent feet Find the number Find the sum Find the value formula fraction geometrical progression given equation Hence highest common factor inclosed indicated integral LINEAR EQUATIONS logarithm m²n² m³n mantissa minuend monomial multiplicand Multiply negative number number of terms numbers whose sum Numerical Illustration obtained Oral Drill parenthesis polynomial present age principle quadratic equation quadratic surd quotient radical radicand ratio remainder required number Result second term Simplify smaller number solution square root Substituting Subtract surd three consecutive twice unknown quantity Whence x²y
Pasajes populares
Página 57 - 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.
Página 9 - The area of a rectangle is equal to the product of its base and altitude. Given R a rectangle with base b and altitude a. To prove R = a X b. Proof. Let U be the unit of surface. .R axb U' Then 1x1 But - is the area of R.
Página 375 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 337 - The pressure of wind on a plane surface varies jointly as the area of the surface, and the square of the wind's velocity. The pressure on a square foot is 1 Ib.
Página 320 - If the product of two numbers is equal to the product of two others, one pair may be made the extremes, and the other pair the means, of a proportion. Given ad = be. (1) To Prove - = -. bd Proof. Dividing both members of (1) by bd, ad_bc_ £_£ bd~bd' b~d' In like manner, we may prove - = - ; - = - ; etc.
Página 375 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor.
Página 158 - At what time between 4 and 5 o'clock are the hands of a clock exactly opposite each other ? 7.
Página 323 - In any proportion, the product of the means equals the product of the extremes.
Página 89 - ... the square of the second. _ Again, (a — by = (a — 5) (a — 5) = a2 — 2a6 + 52. (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 first by the second, plus the square of the second.
Página 369 - The foregoing method is based on the assumption that the differences of logarithms are proportional to the differences of their corresponding numbers, which, though not strictly accurate, is sufficiently exact for practical purposes.