# Arithmetic in Whole and Broken Numbers: Digested After a New Method, and Chiefly Adapted to the Trade of Ireland. To which are Added, Instructions for Book-keeping. With The Dignity of Trade in Great-Britain and Ireland. Extracted from The Mercantile Library; Or, Compleat English Tradesman. Likewise An Appendix to Algebra

P. Wogan, 1792 - Business mathematics - 280 pages
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Page 94 - Multiply the numerators together for a new numerator, and the denominators together for a new denominator.
Page 237 - I demand the sum of their squares, and the cube of their difference ? 19. Suppose there is a mast erected, so that % of its length stands in the ground, 12 feet of it in the water, a,nd £• of its length in the air, or above water; I demand the whole length ? . Ans. 216 feet. Jlns. the sum of-their squares is 3341. The cube of Jheir difference is 1331. 20. What difference is there between
Page 263 - England, as it generally is in other countries, the meanest thing the men can turn their hand to; but, on the contrary, trade is the readiest way for men to raise their fortunes and families; and therefore it is a field for men of figure and of good families to enter upon.
Page 275 - ... the product of the sum and difference of any two quantities, is equal to the difference of their squares.
Page 266 - ... to trade, to the increase of our commerce at home, and the extending it abroad. It is owing to trade, that new discoveries have been made in lands unknown, and new settlements and plantations made, new colonies planted, and new governments formed, in the uninhabited islands, and the uncultivated continent of America; and those plantings and settlements have again enlarged and increased the trade, and thereby the wealth and power of the nation by whom they were discovered and planted; we have...
Page 223 - C, \$1,440. 7. A person having about him a certain number of crowns, said, if a third, a fourth, and a sixth, of them were added together, the sum would be 45 ; how many crowns had he ? A. 60.
Page 174 - Ct. of ammunition was to be removed from a place in 9 Days, and that in 6 days time I find to have carried away 4500 Ct.
Page 270 - Thus, in the square it is 2 ; in the cube it is 3 ; in the fourth power it is 4 ; and so of the rest. iv. That if the coefficient of a in any term be multiplied by its index, and the product divided by the number of terms to that place, the quotient will give the coefficient of the next term. Thus, . ,, f ., coeff.
Page 274 - Dimerrfions, it cannot be anfwered by any of the Methods before laid down ; and therefore we muft have Recourfe to fome other Method; which is by completing the Square, and is performed by the following . Rule. Add the Square of half the Co-efficient of the unknown Quantity to both Sides of the Equation, and the Square will be complete.
Page 264 - ... hundred pounds a year to three hundred, or thereabouts, though they are often as proud and high in their appearance as the other; as to them, I say, a shoemaker in London shall keep a better house, spend more money, clothe his family better, and yet grow rich too. It is evident where the difference lies; an estate's a pond, but trade's a spring...