An Intire System of Arithmetic: Or, Arithmetic in All Its Parts: Containing I. Vulgar; II. Decimal; III. Duodecimal; IV. Sexagesimal; V. Political; VI. Logarithmical; VII. Lineal; VIII. Instrumental; IX. Algebraical. With the Arithmetic of Negatives, and Approximation Or Converging Series ... With an Appendix ..., Volume 6

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Printed; Sold by Mount and comp., 1721 - Algebra - 395 pages
 

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Page 233 - But if it be enquired at what number of Years, it is an even Lay that a Person of any Age shall die...
Page 64 - TV) ~^~- (-rVr* then multiply the Numerator of the Divifor by the Denominator of the Dividend, and the Product is 1050, the Denominator of the 'Quotient.
Page 75 - ... when four quantities are in geometrical proportion, the product of the two extremes is equal to the product of the two means :" a principle which is at the foundation of the Rule of Three in arithmetic.
Page 75 - If three quantities be proportional, the product of the two extremes is equal to the square of the mean ; for, if a : b '.; b : c, then, by theorem 1, ac=b3.
Page 368 - ... diameter, or a line passing through the centre, and terminating at the surface on both sides. 13. The height or altitude of a solid, is a line drawn from its vertex, or top, perpendicular to its base. MENSURATION OF SUPERFICIES AND SOLIDS. PROBLEM I.
Page 182 - Algebra^ contrived this Rule or Canon, which has but one, and that a fhorter Divifion. i. For the prefent Worth ; Multiply the Days in a Year, the Principal given, and 100, in each other, for the Dividend. And add the Product of 365 by...

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