document.write( "Question 802321: Bob is building a deck tha tis 32 feet long, and he has posts that are 6 inches square to use to build the railing. If he puts the posts 4 feet apart with one each end, how many posts will he use? \n" ); document.write( "

Algebra.Com's Answer #483835 by josmiceli(19441) $\"\"$ $\"About$

You can put this solution on YOUR website!
There is going to be 1 more post than the number of
\n" ); document.write( "spaces between posts. For example, if there were 10
\n" ); document.write( "spaces, there would be 11 posts
\n" ); document.write( "-----------------------------
\n" ); document.write( "Let $\"+n+\"$ = the number of $\"+4+\"$ ft spaces
\n" ); document.write( " $\"+n+%2B+1+\"$ = the number of posts
\n" ); document.write( "-----------------
\n" ); document.write( "Note that $\"+6+\"$ in = $\"+.5+\"$ ft
\n" ); document.write( " $\"+4n+%2B+.5%2A%28+n+%2B+1+%29+=+32+\"$
\n" ); document.write( " $\"+4n+%2B+.5n+%2B+.5+=+32+\"$
\n" ); document.write( " $\"+4.5n+=+31.5+\"$
\n" ); document.write( " $\"+n+=+7+\"$
\n" ); document.write( " $\"+n%2B+1+=+8+\"$
\n" ); document.write( "He will use 8 posts
\n" ); document.write( "------------------
\n" ); document.write( "check:
\n" ); document.write( " $\"+4n+%2B+.5%2A%28+n+%2B+1+%29+=+32+\"$
\n" ); document.write( " $\"+4%2A7+%2B+.5%2A8+=+32+\"$
\n" ); document.write( " $\"+28+%2B+4+=+32+\"$
\n" ); document.write( " $\"+32+=+32+\"$
\n" ); document.write( "OK
\n" ); document.write( " \n" ); document.write( "

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