Answer:
The answer would be B. When you add a negative and a positive it equals a negative, Like when adding a positive and a negative. But, adding two that are the same, like a positive and a positive equals a positive.
Step-by-step explanation:
 
        
             
        
        
        
Hey there!! 
(1) Both the angles sum up to be 180. 
(2) Both the angles sum up to be 90
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(1) 4x+5+8x-5=180 
... 12x=180 
... x= 180/12 
... x = 15 
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(2) 4z+3z+6=90 
... 7z+6=90 
... 7z=84 
... z=84/7
... x=12 
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Hope it helps!
 
        
             
        
        
        
Answer:
-t2+10t-h+8  = 0
Step-by-step explanation:
 
        
             
        
        
        
Answer:
44
Step-by-step explanation:
 
        
                    
             
        
        
        
W= width 
L= length= 2W-4
Perimeter= 70
FIND WIDTH:
P= 2(L + W) 
P= 2L + 2W
substitute 2W-4 for L
70= 2(2W-4) + 2W
multiply 2 by all in parentheses
70= (2*2W) + (2*-4) + 2W
70= 4W - 8 + 2W
combine like terms
70= 6W - 8
add 8 to both sides
78= 6W
divide both sides by 6
13= W
FIND LENGTH:
substitute w=13 to find width
L= 2W-4
L= 2(13)-4
L= 26-4
L= 22
CHECK:
P= 2(L + W)
70= 2(22 + 13)
70= (2*22) + 2(13)
70= 44 + 26
70= 70
ANSWER:
length= 22 inches
width= 13 inches
Hope this helps! :)