3 years ago

How do i solve 2x-y=9

Mathematics

1 answer:

devlian [24]3 years ago

3 0

20 with a number minus what will equal 9. ^_^

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The answer for 5+b=25 isb=20

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2 years ago

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timofeeve [1]

Answer:

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Step-by-step explanation:

Think about what fraction become .3 when put into a calculator

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Find the equation of the inverse.<img src="https://tex.z-dn.net/?f=y%20%3D%20%20%7B2%7D%5E%7Bx%20%2B%205%7D%20%20-%206" id="TexF

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Find the equation of the inverse.

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we have

$y=\mleft\{2\mright\}^{\mleft\{x+5\mright\}}-6$

step 1

Exchange the variables

x for y and y for x

$x=\{2\}^{\{y+5\}}-6$

step 2

Isolate the variable y

$(x+6)=2^{(y+5)}$

apply log both sides

$\begin{gathered} \log (x+6)=(y+5)\cdot\log (2) \\ y+5=\frac{\log (x+6)}{\log (2)} \\ \\ y=\frac{\log(x+6)}{\log(2)}-5 \end{gathered}$

step 3

Let

$f^{(-1)}(x)=y$

therefore

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$f^{(-1)}(x)=\frac{\log(x+6)}{\log(2)}-5$

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Step-by-step explanation:

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