<PRE><B>Question 951274</B>
T(a)=cost company A; T(b)=cost company B; k=kilometers driven
T(a)=29$/wk+$13k
T(b)=$85/wk+$6k
Costs will be the same when T(a)=T(b)
$29/wk+$13k=$85/wk+$6k Subtract $6k from each side.
$29/wk+$7k=$85/wk Subtract $29/wk from each side.
$7k=$56/wk Divide each side by $7
k=8/wk ANSWER: Both companies cost the same if you drive 8 km/wk. 

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