The picture in the attached figure
we know that
<span>the diameter divides the circle into two equal parts
so
if </span><span>rt is a diameter and rt is perpendicular to UV
then
SV=US
SV=9 units
the answer isSV=9</span>
(3x)^2 + 12x + 4
You're welcome.
Actually, it is 40 mph. Unless you mean he goes to the store in half an hour and back in another half. Just clarify the wording.