A Complete Algebra to Accompany Rays Series of Mathematics
A Complete Algebra to Accompany Rays Series of Mathematics
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In our eReader you can find the full English version of the book. Read A Complete Algebra to Accompany Rays Series of Mathematics Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book A Complete Algebra to Accompany Rays Series of Mathematics
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AHx" + flr^) = 2a^x + 1. 39. 4. T + = 4r?. ^ ' ^ XX a:4-2^a; + 4 a; 4-6* L X X (20" -f 2h^ 36. X^ — x{2a — b) — 2ab. 40. X^ — rc P^g _ ^ ) ~ ~ "'• CHAPTER XXL PROBLEMS INVOLVING QUADRATICS. 378. — 1. A SELLS a box for |24, and by so doing lie gains as much per cent as the box cost. AVhat was the cost of the box? Let X denote the number of dollars the box cost. Then — — denotes one per cent of the price, and x times or "o ■—— — -^ denotes x per cent of the price. Since the cost is x, and the gai...n is —r--, therefore x -\- -~~r is the selling price. But 24 equals the selling price. A? . • . (Ax. 1) X -[-—- = 24, whence x = 20 or — 120. Only the positive value of x is admissible; therefore the box cost 120. . 379. -2. A rows 7 miles down stream and back again in 3 hours 20 minutes. Supposing the river to have a current of 2 miles per hour, find the rate of rowing. Let X denote the rate of rowing; that is, the number of miles A could row per hour in still water.
What to read after A Complete Algebra to Accompany Rays Series of Mathematics?
You can find similar books in the "Read Also" column, or choose other free books by George W Smith to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
AHx" + flr^) = 2a^x + 1. 39. 4. T + = 4r?. ^ ' ^ XX a:4-2^a; + 4 a; 4-6* L X X (20" -f 2h^ 36. X^ — x{2a — b) — 2ab. 40. X^ — rc P^g _ ^ ) ~ ~ "'• CHAPTER XXL PROBLEMS INVOLVING QUADRATICS. 378. — 1. A SELLS a box for |24, and by so doing lie gains as much per cent as the box cost. AVhat was the cost of the box? Let X denote the number of dollars the box cost. Then — — denotes one per cent of the price, and x times or "o ■—— — -^ denotes x per cent of the price. Since the cost is x, and the gai...n is —r--, therefore x -\- -~~r is the selling price. But 24 equals the selling price. A? . • . (Ax. 1) X -[-—- = 24, whence x = 20 or — 120. Only the positive value of x is admissible; therefore the box cost 120. . 379. -2. A rows 7 miles down stream and back again in 3 hours 20 minutes. Supposing the river to have a current of 2 miles per hour, find the rate of rowing. Let X denote the rate of rowing; that is, the number of miles A could row per hour in still water.
What to read after A Complete Algebra to Accompany Rays Series of Mathematics?
You can find similar books in the "Read Also" column, or choose other free books by George W Smith to read onlineMoreLess
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