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trasher [3.6K]
4 years ago
11

Can some one explain to me what substitution is and how to use it to solve equations?

Mathematics
1 answer:
Yakvenalex [24]4 years ago
5 0

Answer:

Step-by-step explanation:

Say that your equation is 2x+4=8, x=2

you would plug in the 2 where your x is so, 2(2) +4=8

then you'd solve regularly.

Hope my answer has helped you!

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Sinxcosxtanx=1-cos^2x
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Step-by-step explanation:

sin  x \: cos  x \: tanx = 1 -  {cos}^{2} x \\ LHS \\= sin  x \: cos  x \: tanx \\  =sin  x \: cos  x \: \times  \frac{sin  x}{cos  x}  \\  = sin  x \: \times  \frac{sin  x}{1} \\  ={sin}^{2}  x \\  = 1 -  {cos}^{2} x \\  = RHS \\  \therefore \: sin  x \: cos  x \: tanx = 1 -  {cos}^{2} x \\ Hence \: Proved.

7 0
3 years ago
9+(6w+3w) how do I do this it is to hardThe expression (9+6w)+3w
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6 0
3 years ago
The length of a rectangular picture frame is 4 inches shorter than its width. If the perimeter of the picture frame is 44 inches
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Answer:

11

Step-by-step explanation:

44*4=44

4 0
2 years ago
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