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Aleonysh [2.5K]
4 years ago
5

If x+9/x=(-3) then find x²-27​

Mathematics
1 answer:
Sedaia [141]4 years ago
3 0

Answer:

x = -9/4

Step-by-step explanation:

We have:

(x + 9)/x = -3

(x + 9) = -3x

3x + x + 9 = 0

4x + 9 = 0

4x = -9

x = -9/4

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Answer: C

Step-by-step explanation: With inverse equations, you switch y and x (y=f(x)) and undo/reverse the steps towards x.

1. Multiply by 3

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Equation by itself

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8 0
4 years ago
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for small changes in temperature, the formula for the expansion of a metal rod under a change in temperature is: g-l=al(t-t), wh
Anuta_ua [19.1K]

Equation giving the length of this rod at temperature is g = 0.000085t + 84.991075 cm.

What is temperature ?

  • A temperature is a unit used to represent voguishness or coolness on any of a number of scales, including Fahrenheit and Celsius.
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Given that,

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Learn more about temperature here: brainly.com/question/24746268

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3 0
2 years ago
Alaina is selling wreaths and poinsettias for her chorus fundraiser. Wreaths cost $27 each poinsettia cost $20 each. If she sold
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3 years ago
Determine the best method to solve the system of equations. x = 2y – 1 3x + y = 11
IRINA_888 [86]

Answer:

Subsitution

Step-by-step explanation:

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Addition/Elimination involves adding the two equations together to clear a variable, solving for the other variable, and substituting the answer to the first variable in one of the equations to find the value of the cleared variable from before

Since we have x already isolated onto one side in the first expression, we can easily substitute it as 2y-1 in the second equation.

Therefore, substitution is the best method to solve this graph.

hope this helps!

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3 years ago
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Anni [7]
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