Answer: The length of BC is 7
Step-by-step explanation: Assuming the lengths of the opposite sides of the quadrilateral are congruent, then
AB=DC and 
AD=BC
Inputting the values of AB, DC and AD as given in the question:
x + 8 = 3x ...(1)
x + 3=? ...(2)
We have to solve for the value of x to get the actual lengths and thus ascertain BD. 
From equation (1):
8 = 3x - x
8 = 2x 
8/2 = x
Therefore, x = 4.
If x = 4 then equation(2) would be
 4 + 3= 7.
Hence, the actual lengths of the quadrilateral are:
AB = 4 + 8. DC = 3(4)
 =12. =12.
AD = 4 + 3. AD = BC 
 = 7. Therefore, BC = 7.
Hence, it is confirmed that quadrilateral ABCD is a parallelogram since both the opposite sides are proven to be congruent.
 
        
             
        
        
        
Answer:
∠ 1 and ∠2
Step-by-step explanation:
Adjacent angles share a common ray or side between them, and have the same vertex.  
Therefore, the adjacent angles from the given image are: ∠ 1 and ∠2. 
The other given options are not adjacent angles because they do not have the same common vertex and ray.   
 
        
             
        
        
        
Answer:
3x+0.3=3.3.
                                \            /     
                     We move all terms to the left:
                               3x+0.3-(3.3.)=0
        
We add all the numbers together, and all the variables
                              
3x+0.3-0=0
        
We add all the numbers together, and all the variables
                              
3x+0.3=0
      We move all terms containing x to the left, all other terms to the right
                                3x=-0.3
                                
x=-0.3/3
                                x=-0.3/3
                                /             \
*eliza*
 
        
             
        
        
        
Kai is 13 blocks from home. Jack is a greater distance away. 
In this statement, 13 would represent the distance Kai is from home.... x would equal how much further away Jack is. 
Hope this helps!!! Have an amazing day!!!! :)
 
        
                    
             
        
        
        
Answer: the answer is 59,527 is divided by 23, the quotient is 2,588 R 3
the answer is 3 or remainder 3
Step-by-step explanation: brainlest please