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WARRIOR [948]
3 years ago
7

What is the answer for this using substitution?

Mathematics
1 answer:
damaskus [11]3 years ago
8 0

9514 1404 393

Answer:

  (x, y) = (2, -2)

Step-by-step explanation:

We would normally choose to use substitution when x or y could be easily solved-for without having fractions involved. That is not the case here. However, we observe that the term 3y appears in both equations, so we can substitute for "3y" instead of "y".

From the second equation, ...

  3y = 5x -16

Substituting into the first equation, ...

  2x +(5x -16) = -2

  7x = 14 . . . . . . . . . add 16

  x = 2 . . . . . . . . . .  divide by 7

Using our equation for y, we get ...

  3y = 5(2) -16 = -6

  y = -2 . . . . . . . . . divide by 3

The solution is (x, y) = (2, -2).

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3 years ago
If there are 420 students surveyed, which equation can be used to find the number of students s who prefer rap? Pop: 5/8 Jazz: 1
Aleksandr [31]

Answer:

B. s=\dfrac{1}{4}\times420

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3 0
3 years ago
What is the square root of <br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B163%7D%20" id="TexFormula1" title=" \sqrt{163} " a
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\sqrt{163} = 12.76

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The actual square root value is ≈12.767145334803704

But we have taken only significant figures and it is as 12.76.


Hope it helps! :)

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