Answers to Algebra Quiz

Answers to Algebra Quiz - Griffith University, School of...

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1201/1602SCE answers to sample algebra quiz 1 Griffith University, School of Science 1201SCE/1602SCE Mathematics 1A Short answers to sample quiz You can just write down the answer but in many cases it is very helpful to do some working. Questions are marked right or wrong – there are no half marks 1 ae a ce b bc b c −= (put over common denominator) 2 * ac a c bf b f = - combine numerators and combine denominators 3 1 */ / 1 1 / a a f f af af bf b f b b == = - multiply top by f and bottom by f 4 25 1 2 5 1 7 31 8 1 8 += + = 5 22 * 44 2 yy y x xx 6 2 1( 1 ) * 1 1 ) ( 1 ) x x x x x x −+ +− = −− - put over common denominator, top line does not have simple factors 7 23 yx x y + - again common denominator 8 43 2 55 = 9 ab + - does not simplify – it is definitely not + 10 (2 1)( 3) 2 6 3 2 7 3 x = + = + 11 4( 7) 5( 5) (4 28) (5 25) 3 x x x =−−−= 12 2 2 2 2 () ( ) 2 cdcd d c d d c d =−−= 13 52 2 3 54 9 6 33 10 .(10 ) 10 10 *10 10 10 10 10 = 14 2 2 10 1 1 10 1000 100 10 === 15 2 1/2 10 10 =
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1201/1602SCE answers to sample algebra quiz 2 16 4 10 log (10 ) 4 = - from the definition of log to base 10 17 27 7 2 5 10 10 10 log (10 x10 ) log (10 ) log (10 ) 5 −− == = 18 10 10 log (100) log (0.1) 2 ( 1) 1 + =+ −=
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This note was uploaded on 04/14/2011 for the course MATHS 1201BPS taught by Professor Mariaaneiros during the Three '11 term at Griffith.

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Answers to Algebra Quiz - Griffith University, School of...

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