Answer:
5 x (4+y)
Step-by-step explanation:
 
        
             
        
        
        
Answer:
√50= 5√2
Step-by-step explanation:
50=25*2
√50=√25*2
√50=√5*5*2
√50= 5√2
 
        
                    
             
        
        
        
Answer:
x = 18
Step-by-step explanation:
We need to find the value of x.
We know that the sum of angles of a triangle is equal to 180°. So, using this property,
2x+1+3x-1+90 = 180
2x+3x = 180-90
5x = 90
x = 18 
So, the value of x is equal to 18.
 
        
             
        
        
        
Answer: 
Should be 4/7
Hope it helps have a good day!
 
        
             
        
        
        
1)12 ÷ 3 = 4. 
2) 4×2= 8.
3) 9× 8= 72.
4) 8² = 64
5) 64+ 72 = 136
6) 136 - 7 = 129.
If you just want to simplify the expression you get: 8² + 9(8) - 7
But when you simplify that you get the answer below. 
ANSWER: 129