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tatuchka [14]
2 years ago
8

A) Rationalise the denominator of 20/root 10 Give your answer in its simplest form.

Mathematics
2 answers:
denis-greek [22]2 years ago
5 0

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎\bigstar \boxed{\large\bf{\leadsto 2\sqrt{10}}}

__________________________________________

\large\bf{Here,}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎\large\bf{⟹\frac{20}{\sqrt {10}}}

❒ Multiply the numerator and denominator by \bf{\sqrt{10}}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎\large\bf{⟼\frac{20}{\sqrt{10}}\times\frac{\sqrt{10}}{\sqrt{10}}}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎\large\bf{⟼\frac{20\sqrt{10}}{(\sqrt{10})^2}}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎\large\bf{⟼\frac{20\sqrt{10}}{10}}

‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎‎‎ ‎ ‎\large\bf{⟼2\sqrt{10}}

Montano1993 [528]2 years ago
4 0
<h3>Answer:</h3>

\bf 2 \sqrt{10}  \approx6.32456

<h3>Step-by-step explanation:</h3>

\sf  \frac{20}{ \sqrt{10} }

\sf  =  \frac{20}{ \sqrt{10} }  \times  \frac{ \sqrt{10} }{ \sqrt{10} }

\sf  =  \frac{20 \sqrt{10} }{ \sqrt{10} \sqrt{10}  }

\sf  =  \frac{20 \sqrt{10} }{10}

\sf  = 2 \sqrt{10}  \approx6.32456

<h3>Conclusion:</h3>

Simple form of \sf  \frac{20}{ \sqrt{10} } is \bf 2 \sqrt{10}  \approx6.32456.

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Y=x +5<br> 5x + 2y=1<br><br> Can you show the steps thanks
lubasha [3.4K]

Answer:

(-9/7,-26/7)

[more detailed at the bottom of the explanation]

Step-by-step explanation:

I am assuming that this is a system of equations...

So, knowing that y is equal to x + 5, you would plug that in the second equation and find x. Then you would plug x and find y.

—————

Step 1)

Equation 1:

y = (x + 5)

Equation 2:

5x + 2y = 1

Equation 2 can also be written as:

5x + 2(x+5) = 1

I wrote x+5 instead of y because the first equation tells us that y is equal to x + 5.

—————

Step 2)

Solve for x .

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—————

Step 3)

Plug the x value back in the first equation.

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—————

Solution:

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In ordered pair form:

(-9/7,-26/7)

————— ————— —————

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