Answer: 
Step-by-step explanation:
Given
Two forces of 9 and 13 lbs acts
angle to each other
The resultant of the two forces is given by

Insert the values

Resultant makes an angle of

So, the resultant makes an angle of
with 9 lb force
Angle made with 13 lb force is 
Answer:
-50 feet
Step-by-step explanation:
The trout is swimming 30 ft below sea level,if it were above sea level it would be positive but since its below it is negative. It then swims 20 feet lower so it would be -50 as a short cut you can use in problems like this one is to ignore the sign's and add it regularly then add the sign after the equation is done.
Answer: 1.17
Step-by-step explanation: multiply 9 x 0.13
<h3><u>25</u> ( <u>13</u><u> </u> - <u>3</u><u>)</u></h3><h3> 6 ( 3 2)</h3>
<u>25</u><u> </u><u> </u>( <u>39 -9)</u>
6 (6)
<u>2</u><u>5</u><u> </u> × <u>30</u>
6 6
<u>125</u>
6
20 <u> 5</u><u> </u><u> </u> [ans]
6
I hope this helps you
Perimeter=4 (7+3x)
Perimeter=28+12x