New School Algebra

Ginn, 1898 - 407 σελίδες

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Σελίδα 328 - There are four numbers in geometrical progression, the second of which is less than the fourth by 24 ; and the sum of the extremes is to the sum of the means, as 7 to 3. What are the numbers ? Ans.
Σελίδα 10 - If an expression within a parenthesis is preceded by the sign +, the parenthesis may be removed without making any change in the signs of the terms of the expression.
Σελίδα 314 - The area of a circle varies as the square of its radius, and the area of a circle whose radius is 1 foot is 3.1416 square feet.
Σελίδα 164 - 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?
Σελίδα 368 - 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 21 - Two men start from the same place and travel in the same direction ; one, 5 miles an hour ; the other, 7 miles an hour.
Σελίδα 54 - To multiply a polynomial by a monomial, multiply each term of the polynomial by the monomial and add the partial products: (6a — 3ft) x 3c = 18uc -96c.
Σελίδα 170 - If necessary, multiply the given equations by such numbers as will make the coefficients of one of the unknown numbers in the resulting equations of equal absolute value.
Σελίδα 315 - The volume of a sphere varies as the cube of its radius. If the...
Σελίδα 34 - From these four cases we see that subtracting a positive number is equivalent to adding an equal negative number ; and that subtracting a negative number is equivalent to adding an equal positive number.

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