Answer:
Question 2.) 16
144÷9=16
Question 3.) 16
16÷12=1.33... and all the others equal 1.33... as well
Question 4.) 20
20÷16=1.25   and all tho others equal 1.25 as well
Question 5.)12
8÷12=0.66...    and all the others equal 0.66.... as well
I hope this is good enough for you:
 
        
                    
             
        
        
        
Answer:2.87
Step-by-step explanation:
 
        
             
        
        
        
2.463877654353522256198573488 thats what it seaded 
        
             
        
        
        
Let the number be a ....
=>Number doubled : 2a ..
=>Eight less than the no. Doubled : 2a - 8
=>Eight less than the no. doubled is 20 more than the no. : 2a - 8 = 20 + a
=>2a - 8 - 20 - a = 0
=>2a -a - 20 -8 = 0
=>a -28 = 0
=>a = 28
=>so the number is 28...
Hope it helps!!!
        
             
        
        
        
Answer:
Step-by-step explanation:
sin=y/r
cos=x/r
sin=21/29
cos=x/29
x^2+y^2=r^2
x^2+21^2=29^2
x^2+441=841
x=sqrt(841-441)
x=20
cos=20/29
                        
   Only              |
    sin +             |     All Positive
---------------------|-------------------
            only      |    Only cos +
             tan +    |