1020 + 1020 = 2040
%60 of 1020 is:612
2040+612=2652
so third one is true
        
                    
             
        
        
        
Answer:
x
=
±
2
√
3
−
3
Step-by-step explanation:
Add 
3
 to both sides of the equation.
x
2
+
6
x
=
3
To create a trinomial square on the left side of the equation, find a value that is equal to the square of half of 
b
.
(
b
2
)
2
=
(
3
)
2
Add the term to each side of the equation.
x
2
+
6
x
+
(
3
)
2
=
3
+
(
3
)
2
Simplify the equation.
Tap for more steps...
x
2
+
6
x
+
9
=
12
Factor the perfect trinomial square into 
(
x
+
3
)
2
.
(
x
+
3
)
2
=
12
 
        
             
        
        
        
Answer:
just graph it mate
Step-by-step explanation:
 
        
             
        
        
        
Second one is correct, that is an identity.
Third one is a contradiction:
6x - 15 = 3 * (2x - 6)    ------>    6x - 15 = 6x - 18
Fourth one:
5x - 3 * (x - 4) = 2 * (x - 6) ---> 5x - 3x + 12 = 2x - 12 ---> 2x + 12 = 2x -12
So this is a contradiction as well.
        
             
        
        
        
B = ym + y
B - y = ym
(B - y) / y = m
or
B/y - 1 = m