Carbon dioxide and water combine with sunlight in the chloroplasts to form sugars (glucose) and oxygen 
 
        
             
        
        
        
Answer: DEb = 26°
Step-by-step explanation:
<u>Given information</u>
CEF = 7x + 21
FEB = 10x - 3
<u>Given expression deducted from the definition of the bisector</u>
FEB = CEF
<u>Substitute values into the expression</u>
10x - 3 = 7x + 21
<u>Subtract 7x on both sides</u>
10x - 3 - 7x = 7x + 21 - 7x
3x - 3 = 21
<u>Add 3 on both sides</u>
3x - 3 + 3 = 21 + 3
3x = 24
<u>Divide 3 on both sides</u>
3x / 3 = 24 / 3
x = 8
<u>Find the sum of the angle of CEF and FEB</u>
  7x + 21 + 10x - 3
=7 (8) + 21 + 10 (8) - 3
=56 + 21 + 80 - 3
=77 + 80 - 3
=157 - 3
=154
<u>Subtract 154 from the straight angle</u>
DEB = 180 - 154

Hope this helps!! :)
Please let me know if you have any questions
 
        
             
        
        
        
x - y = - 11   .............( 1 ) 
y + 7 = - 2x ...............( 2 )
from equation ( 1 ) 
x - y = - 11
x   = -11 + y  ...........( 3)      
putting x in equation  ( 2 ) 
y + 7 = - 2 x  
y  + 7 = -2 ( -11 + y )             y + 7 = 22 - 2 y                       y + 2 y =22 - 7            
3 y = 15                  y = 15 / 3 
putting value of y in equation 3 
x   = -11+ ( 13 /5 )                       x = -33 /3 + 15 / 3         ( l.c.m)
x  = -17 / 5                       
check       
 x = -11 + y 
- 17 / 5 = -11 + 13 / 5 
-17 /5   = -17 / 5
 
        
             
        
        
        
Answer:
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Step-by-step explanation: