Answer:
Here's a tip:
Step-by-step explanation:
Use the acronym PEMDAS to solve.
P arenthesis
E xpoments
M ultiplication
D ivsion
A ddition (Left to right)
S ubtraction (Left to right)
 
        
             
        
        
        
Answer:
Your answer: 676
Step-by-step explanation:

 
        
             
        
        
        
1.first false because it gives 8>8, that is false , but it is written 8=8
2.false because it gives 12>8 but written -12<8
3.gives 10>8, and it is written the same true
4.gives 4>8, but written 4<8
        
                    
             
        
        
        
Answer:
x = 5 and value of y = 2
Step-by-step explanation:
using substitution method
let;
x + 4y = 13...................... equation 1
x - y = 3............................... equation 2
 from equation 2
x - y = 3.................................... eqn 2
x = y + 3.......................................... equation 3
put x = y + 3 in equation 1
x + 4y = 13...................... equation 1
y + 3 + 4y = 13
5y = 13 - 3
5y = 10
divide both sides by 5
i.e
5y/5 = 10/5
y = 2
sustitue for y  = 2 in equation 3
x = y + 3.......................................... equation 3
x = 2 + 3
x = 5
therefore the value of x = 5 and value of y = 2
to check if your answwer is correct slot in the value of x and y in any of the equation . e.g
 from equation 3
x = y + 3.......................................... equation 3
5= 2 + 3
5 =5....................... proved