First Course in Algebra, Βιβλίο 1Macmillan, 1919 - 334 σελίδες |
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Σελίδα 8
... CHECK . Whenever an answer does what the problem demands of it , it is said to check . In this problem , the answer 13 checks be- cause 3 × 13 + 1 = 6 , just as the first equation ( or 3 x + 1 = 6 ) demands . WRITTEN EXERCISES Solve the ...
... CHECK . Whenever an answer does what the problem demands of it , it is said to check . In this problem , the answer 13 checks be- cause 3 × 13 + 1 = 6 , just as the first equation ( or 3 x + 1 = 6 ) demands . WRITTEN EXERCISES Solve the ...
Σελίδα 10
... Check each answer . 1. 2x 1 = 5 . 2. 2x + 1 = 5 . 6. 1.2x + 2.3-4.7 11. 8r + .23.87 7. 5r - 15 = .75 12. z - 84-10 } . 8. 5x + .03 = .08 9. 11s - 3 . 3. 4x - 3 = 17 . 4. 5x + 3 = 18 . 5. 2x - 11 = 1 . 10. t - 15 = 23 . 13. 3 ...
... Check each answer . 1. 2x 1 = 5 . 2. 2x + 1 = 5 . 6. 1.2x + 2.3-4.7 11. 8r + .23.87 7. 5r - 15 = .75 12. z - 84-10 } . 8. 5x + .03 = .08 9. 11s - 3 . 3. 4x - 3 = 17 . 4. 5x + 3 = 18 . 5. 2x - 11 = 1 . 10. t - 15 = 23 . 13. 3 ...
Σελίδα 15
... m - 12m + 3 . 14. 3r - 8 = 16 . 17. 4x - 1 = 2x + 6 . 15. 5 + 4a = 21 . 18. r + r + z . 20 . r - 8 = 3r + 3 . 21. 6m - 23 = m + 2 . WRITTEN EXERCISES Solve each of the following equations and check I , § 12 ] 15 LITERAL NUMBERS.
... m - 12m + 3 . 14. 3r - 8 = 16 . 17. 4x - 1 = 2x + 6 . 15. 5 + 4a = 21 . 18. r + r + z . 20 . r - 8 = 3r + 3 . 21. 6m - 23 = m + 2 . WRITTEN EXERCISES Solve each of the following equations and check I , § 12 ] 15 LITERAL NUMBERS.
Σελίδα 16
... check your answer in each case . 1. 5x − 2 = x + 10 . 2. 10 r + 4 = 6r + 16 . 3. 4 + 5a = 11-2 a . 4. 13 y - 99 = 7y + 69 . 5. 6z - 4-2 z + 20 . 6. 12x - 2x = 20 + 5x . 7. 20 + 7x - 5x = 48-4x . 8. 6x - 15-9 = 4x - 2x . 9. 2x + 3x ...
... check your answer in each case . 1. 5x − 2 = x + 10 . 2. 10 r + 4 = 6r + 16 . 3. 4 + 5a = 11-2 a . 4. 13 y - 99 = 7y + 69 . 5. 6z - 4-2 z + 20 . 6. 12x - 2x = 20 + 5x . 7. 20 + 7x - 5x = 48-4x . 8. 6x - 15-9 = 4x - 2x . 9. 2x + 3x ...
Σελίδα 25
... Check each answer . 33. A farmer sold a horse and cow for $ 210 . He sold the horse for four times as much as the cow . How much did he get for each ? $ 42 , $ 168 . Ans . [ HINT . Let x = = the selling price of the cow . ] 34. A ...
... Check each answer . 33. A farmer sold a horse and cow for $ 210 . He sold the horse for four times as much as the cow . How much did he get for each ? $ 42 , $ 168 . Ans . [ HINT . Let x = = the selling price of the cow . ] 34. A ...
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a²+2ab+b² ab+b² added algebra Appendix arithmetic Axiom called cents CHAPTER check your answer circle coefficient common denominator common factor completing the square cube diameter divisor Draw the graph equal EXAMPLE EXERCISES Solve figure Find the H. C. F. Find the numbers Find the value following equations following exercises following expressions fraction further exercises given equation gives highest common factor HINT illustrated inches length lowest common means miles an hour minuend monomial multiply negative numbers numerator and denominator ORAL EXERCISES parentheses perfect square polynomial quadratic quadratic equation quotient radical radicand radius ratio represents result Similarly Simplify simultaneous equations SOLUTION Solve the equation square root subtract subtrahend SUPPLEMENTARY EXERCISES surd Transposing triangle trinomial weight wheel write WRITTEN EXERCISES x²y² yards