Answer:
A. {x,y}={-2,-3}
// Solve equation [2] for the variable x
[2] x = 2y + 4
// Plug this in for variable x in equation [1]
[1] (2y+4) - y = 1
[1] y = -3
// Solve equation [1] for the variable y
[1] y = - 3
// By now we know this much :
x = 2y+4
y = -3
// Use the y value to solve for x
x = 2(-3)+4 = -2
B. [1] 3x=3y-6
[2] y=x+2
Equations Simplified or Rearranged :
[1] 3x - 3y = -6
[2] -x + y = 2
Solve by Substitution :
// Solve equation [2] for the variable y
[2] y = x + 2
// Plug this in for variable y in equation [1]
[1] 3x - 3•(x +2) = -6
[1] 0 = 0 => Infinitely many solutions
C.Step by Step Solution
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System of Linear Equations entered :
[1] 4x - y = 2
[2] 8x - 2y = 4
Solve by Substitution :
// Solve equation [1] for the variable y
[1] y = 4x - 2
// Plug this in for variable y in equation [2]
[2] 8x - 2•(4x-2) = 4
[2] 0 = 0 => Infinitely many solutions
It means the figure is 1/4 the size of the original figure
The other side would have a length of 5m
Answer:
-8 < x ≤ 0
<h3>
Step-by-step explanation:</h3>
Let's remember what open and closed circle mean:
<em>Open Circle:</em>
Less than ( < ) / Greater than ( > )
<em>Closed Circle:</em>
Greater than or equal to ( ≥ ) / Less than or equal to ( ≤ )
Now, let's review this graph:
Let's call this unknown value 'x'
Reading the graph left to right:
x is greater than -8, but is less than <em>or equal to</em> (Remember!! Closed circle!)
We can right this as:
-8 < x ≤ 0
And that is our answer! If your problem wants a different variable (y, z, q, etc) just put that in place of 'x'
Let me know if this helped!
20=-5-x
25=-x
-25=x
First, parentheses, distribute the negative
Then, add 5 to both sides
And finally, divide by -1 which give you the answer -25