Durell's School AlgebraC.E. Merrill, 1916 - 523 σελίδες |
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Δημοφιλή αποσπάσματα
Σελίδα 215 - 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 500 - If the number is less than 1, make the characteristic of the logarithm negative, and one unit more than the number of zeros between the decimal point and the first significant figure of the given number.
Σελίδα 97 - ... the square of the first number, minus the product of the first by the second, plus the square of the second.
Σελίδα 417 - In a mixture of rum and brandy, the difference between the quantities of each, is to the quantity of brandy, as 100 is to the number of gallons of rum; and the same difference is to the quantity of rum, as 4 to the number of gallons of brandy. How many gallons are there...
Σελίδα 507 - To Divide One Number by Another, Subtract the logarithm of the divisor from the logarithm of the dividend, and obtain the antilogarithm of the difference.
Σελίδα 137 - Arts. 75 and 76 a trinomial is a perfect square when its first and last terms are perfect squares and positive, and the middle term is twice the product of the square roots of the end terms.
Σελίδα 415 - 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 217 - A courier who travels 5| mi. an hour was followed after 8 hours by another, who went 7^ mi. an hour. In how many hours will the second overtake the first? 49. A woman can write 15 words per minute with a pen, and a girl can write 40 words per minute on the typewriter. The woman has a start of 3 hours in copying a certain manuscript. How long before the girl using the typewriter will overtake the woman?
Σελίδα 109 - That is, 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.
Σελίδα 277 - The exponent of a in the first term is less by 1 than its exponent in the dividend, and decreases by 1 in each succeeding term. III. The exponent of b in the second term is 1, and increases by 1 in each succeeding term. IV.