For my answer, I got -47 1/2
 
        
             
        
        
        
Answer: 56 / 729
Step-by-step explanation: (4 * 2 * 7) / (9^3)
 
        
             
        
        
        
Answer:
P = A + B + C
Step-by-step explanation:
Essentially, just add the length of each side. The sum is the perimeter.
Hit brainliest if this was helpful :)
 
        
                    
             
        
        
        
How do you solve this system of equations using the addition method: 
4
x
−
y
=
−
4
;
5
x
+
2
y
=
−
18
?
Algebra
1 Answer
IDKwhatName
Jun 30, 2017
 x
=
−
2
,
y
=
−
4
Explanation:
Right now, you have:
4
x
−
y
=
−
4
5
x
+
2
y
=
−
18
To make this easier, you must get rid of one variable, in this case I will remove 
y
, to do this you must make the y-values in both equations the same.
To do this, I will multiply the whole of 
4
x
−
y
=
−
4
 by 2 to give 
8
x
−
2
y
=
−
8
We now have:
8
x
−
2
y
=
−
8
5
z
+
2
y
=
−
18
All we need to do now is 
(
8
x
−
2
y
+
5
x
+
2
y
)
=
(
−
18
−
8
)
≡
13
x
=
−
26
.
Divide both sides by 13 to find 
x
:
13
x
=
−
26
13
x
13
=
−
26
13
x
=
−
2
Now put your value for 
x
 into either equation:
4
(
−
2
)
−
y
=
−
4
−
8
−
y
=
−
4
y
=
−
8
+
4
y
=
−
4
x
=
−
2
;
y
=
−
4
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