Answer:
cos3x
Step-by-step explanation:
y" - y' + 9y = 3 sin 3x


here  will be replaced by
 will be replaced by   where
 where  is coefficient of x
 is coefficient of x




y=cos3x
hence Particular solution is cos3x
 
        
             
        
        
        
Answer:
An instructor at an army base wants to know if a new program that teaches gun safety is effective is described below in brief details.
Step-by-step explanation:
Although of your shooting practice, the handgun safety program illustrates the center fundamentals of handgun protection so that you can tour the range with courage and with safety in the brain. Study how to accurately control, transport, and deposit your handgun, as well as how to keep children secure around handguns.
 
        
             
        
        
        
Divide the actual building's measurements by the replica's measurements.

The measurements of the actual building are divided by 
20 not 12.
The crew member's calculation is 
incorrect.
 
        
        
        
1. a) equation of the line :
y - intercept = -7 
so, it will pass through point (0, -7)
and if we plug the value of x as 5, we get
so, it will pass through point (5, -5) too
now, just plot the points (0 , -7) and (5 , -5) and join them.
2. b) equation of line is :
here, y - intercept = 5
so the line passes through point (0 , 5)
now, Plugging the value of x = 1 we get :
so, the given line passes through point (1 , 2) 
plotting the points, we can get our required line.
 
        
             
        
        
        
<h3>
Answers: Choice A and Choice C</h3>
Explanation:
Think of the vertical lines as train tracks (the metal rails).
Stuff between the rails are interior angles. 
Angles 3 and 6 are one pair of alternate interior angles because they are on alternating sides of the transversal line. The other pair of alternate interior angles are angles 4 and 5.
Alternate interior angles are congruent when we have parallel lines like this.