Answer:A
Step-by-step explanation:
it is A
 
        
                    
             
        
        
        
Hello,
(10-4x²)-(7x+?)=3x-6x²
==>10-4x²-7x-3x+6x²=?
==>?=2x²-10x+10
        
             
        
        
        
Each truck weighs five tons. 
1st truck: n 
2nd truck: n + 2
3rd truck: n + 4
4th truck: n + 6 
n + n + 2 + n + 4 + n + 6 = 32 
4n + 12 = 32 
      - 12   - 12
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4n = 20 
----  ------
 4      4
n = 5 
        
             
        
        
        
Answer: A=16
Step-by-step explanation:
24=a+8
-a=8-24
-a=-16
 
        
                    
             
        
        
        
Answer:
y = 23
Step-by-step explanation:
The diagonals of a rhombus are perpendicular bisectors of each other, thus
∠1 = 90° and ∠1 = 4y - 2, so equating gives
4y - 2 = 90 ( add 2 to both sides )
4y = 92 ( divide both sides by 4 )
y = 23