9/2 is the simplest form of 18/4. 
Hope that helps.
        
                    
             
        
        
        
Answer: add over and over again
Step-by-step explanation:How do you get from 0 to 3? you add 3 to 0. Then, how do you get from 3 to 8? you add another 3 but then you a 2 too, so then 8. Lastly, my last example, how to get from 8 to 15. You take five, and then add 2 to it and add that number(then number you get when you add 5+1), 7 to 8.
 
        
                    
             
        
        
        
Tangent (40) = tree height / 30 feet
tree height  =  tangent (40) * 30 feet
tree height  =  0.8391 * 30
tree height  =  25.173 feet
        
             
        
        
        
<span>F(x)=3x+5/c
</span>F(a+2)=3(a+2)+5/c
or
F(a+2)=3a + 6 + 5/c