#### Answer

3

#### Work Step by Step

Using theorem 6.3.7, we obtain:
$RV \times RT = RS^2 $
We know that RV is equal to RT plus 9 and that RT equals $.5RS$, so we find:
$.5RS(9+.5RS) = RS^2 \\4.5RS = .75RS^2 \\ 6=RS$
RT is half of RS, so it equals 3.

Published by
Brooks Cole

ISBN 10:
1439047901

ISBN 13:
978-1-43904-790-3

3

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