Question 194832
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If s represents the length of the second side, which of the following represents the length of the third side? 
s - 5
<font color=blue>s - 2</font>, Answer
s + 3


Proof:
{{{s[1]=s-5}}}, 5 inches less than 2nd side
{{{s[2]=s}}}
{{{s[3]=s-5+highlight(3)=highlight(s-2)}}}, 3 inches more than 1st side


Solving Perimeter:
{{{P=s[1]+s[2]+s[3]}}}
{{{17=s-5+s+s-2}}}
{{{17=3s-7}}}
{{{17+7=3s}}} ----> {{{24=3s}}} ----> {{{cross(24)8/cross(3)=cross(3)s/cross(3)}}}
{{{red(s=8in)}}}, 2nd side
{{{s-5=8-5=red(3in)}}}, 1st side
{{{s-2=8-2=red(6in)}}}, 3rd side


Check,
{{{17=3+8+6}}}
{{{17=17}}}


Thank you,
Jojo</font>