<em>Answer:</em>
<em>U10 = 19</em>
<em>Step-by-step explanation:</em>
<em>The sequence is </em>
<em />
<em>x is the coefficient to U.</em>
<em>So, </em>
<em />
<em>Which means </em>
<em />
<em>Which means </em>
<em />
<em>And there is your answer.</em>
<em>Hope this helps. Have a nice day.</em>
9.
2x+3+x+9 = 180 => 3x = 168 => x = 56;
m(<ABD) = 2*56 + 3 = 115.
First find the length of the side by taking the square root of 112.
There are 4 sides so multiply your answer by 4 to get the perimeter.
The answer is 42.332 which rounds to 42.