The answer is neither; you only have to substitute the ordered pair on the equation y=7x-2; ordered pair (a,b).Substitution: b=7a-2.
The value of w(-9)=-2|-9+4|=-10
Answer: (7, 20)
Concept:
There are three general ways to solve systems of equations:
- Elimination
- Substitution
- Graphing
Since the question has specific requirements, we are going to use <u>substitution </u>to solve the equations.
Solve:
<u>Given equations</u>
y = 3x - 1
2x + 6 = y
<u>Substitute the y value since both equations has isolated [y]</u>
2x + 6 = 3x - 1
<u>Add 1 on both sides</u>
2x + 6 + 1 = 3x - 1 + 1
2x + 7 = 3x
<u>Subtract 2x on both sides</u>
2x + 7 - 2x = 3x - 2x
![\boxed{x=7}](https://tex.z-dn.net/?f=%5Cboxed%7Bx%3D7%7D)
<u>Find the value of y</u>
y = 3x - 1
y = 3(7) - 1
y = 21 - 1
![\boxed{y=20}](https://tex.z-dn.net/?f=%5Cboxed%7By%3D20%7D)
Hope this helps!! :)
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Answer:
-(13 w + 7)
Step-by-step explanation:
Simplify the following:
-6 w - 8 + 1 - 7 w
Grouping like terms, -6 w - 8 + 1 - 7 w = (-6 w - 7 w) + (1 - 8):
(-6 w - 7 w) + (1 - 8)
-6 w - 7 w = -13 w:
-13 w + (1 - 8)
-8 + 1 = -7:
-13 w + -7
Factor -1 out of -13 w - 7:
Answer: -(13 w + 7)