Answer:
4
Step-by-step explanation:
Think of it this way. You have 2 sets of 2. 
I I (This represents two)
I I (This represents the other two)
When you combine these, you get: 
I I I I
If you count the tally marks, your answer is 4.
 
        
                    
             
        
        
        
Answer:
2
PLZ MARK BRAINLIEST
Step-by-step explanation:
(-8+4) - (3-9) = (-4) - (-6) = -4 + 6 = 2
 
        
             
        
        
        
2.434 to 3 sigfigs = 2.43 .
        
             
        
        
        
Answer:
The dimension of this rectangle = 2mm by 21mm
Where 2 mm = Width of the rectangle
21 mm = Length of the rectangle.
Step-by-step explanation:
The formula for the perimeter of a rectangle = 2(L + W)
= 2L + 2W
The perimeter = 46 mm
L = 3x + 3
W = x - 4
P = 2L + 2W
46mm = 2(3x + 3) + 2(x - 4)
46 = 6x + 6 + 2x - 8
Collect like terms
46 +8 -6 = 6x + 2x
48 = 8x
x = 48/8
x = 6
Since the Length = 3x + 3
= 3(6) + 3
= 18 + 3
= 21mm
Since the Width = x - 4
= 6 - 4
= 2mm
Therefore, the dimension of this rectangle = 2mm by 21mm
Where 2 mm = Width of the rectangle
21 mm = Length of the rectangle.
 
        
             
        
        
        
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Step-by-step explanation:  u want see my work?