Answer: -7
Step-by-step explanation:
-3x - 5 = 16 (add 5 to 16)
-3x = 21 (divide by -3)
x = -7
 
        
                    
             
        
        
        
Answer:
Therefore 20 degree is in First Quadrant, 
i.e Quadrant I.
Step-by-step explanation:
QUADRANT:
When the terminal arm of an angle starts from the x-axis in the anticlockwise direction then the angles are always positive angles.
Quadrant I      -          0° to 90°
Quadrant II     -       90° to 180°
Quadrant III    -      180° to 270°
Quadrant IV    -      270° to 360°
Therefore 20 degree is in First Quadrant, i.e Quadrant I.
When the terminal arm of an angle starts from the x-axis in the clockwise direction than the angles are negative angles.
Quadrant IV  -          0° to -90°
Quadrant III   -       -90° to -180°
Quadrant II    -      -180° to -270°
Quadrant I     -      -270° to -360°
 
        
             
        
        
        
Make sure it has eight sides