Answer:
 x=17 plz the brainliest! 
Step-by-step explanation:
3x+39=90 
 3x+39-39=90-39
3x=51 
\frac{3x}{3}=\frac{51}{3}
x=17
 
        
             
        
        
        
Answer:
4 1/2 in seconds is 14400
Step-by-step explanation:
 
        
                    
             
        
        
        
A. An obtuse angle is less than 180 but greater than 90. So for examples sake I will use 179 degrees. 179 divided by 2 (as the angles are congruent) = 89.5 which is less than a right angle. Therefore, the angles will be acute.
Hope it helps :)
        
                    
             
        
        
        
Answer:
1.450
Step-by-step explanation:
what grade ar4e you in I'm guessing 4th or 5th