document.write( "Question 77769This question is from textbook
\n" ); document.write( ": 1.The average of the numbers 5,9,10,13 and a equals 11. Find the value of a.
\n" ); document.write( "2. Express the following in the form a+bi, where a and b are real numbers
\n" ); document.write( " 3+i/1+2i
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Algebra.Com's Answer #55764 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
1.The average of the numbers 5,9,10,13 and a equals 11. Find the value of a.
\n" ); document.write( "(5+9+!0+13+a)/5=11
\n" ); document.write( "(37+a)=55
\n" ); document.write( "a=55-37=18
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\n" ); document.write( "\n" ); document.write( "2. Express the following in the form a+bi, where a and b are real numbers
\n" ); document.write( "(3+i)/(1+2i)
\n" ); document.write( "Multiply numerator and denominator by (1-2i) to get:
\n" ); document.write( "[(3+i)(1-2i)]/5
\n" ); document.write( "= (3+i-6i+2)/5
\n" ); document.write( "=(5-5i)/5
\n" ); document.write( "=1-i
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.\r
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