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2 years ago

Need help with this question

Mathematics

2 answers:

Paladinen [302]2 years ago

6 0

B) 4/9 is correct

Mark with crown!

schepotkina [342]2 years ago

6 0

There is 4 even numbers and 9 numbers in total, would you divide 9 by 4 get 0.44 repeating and turn that into a fraction

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Find the slope of a line perpendicular to y = -2/5x + 4/5

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2 years ago

Rationalize the denominator

Mamont248 [21]

Answer:

$\huge\color{purple}\boxed{\colorbox{black}{Answer♡}}$

$\frac{2}{ \sqrt{7} - 1} \\ = > \frac{2}{ \sqrt{7} - 1} \times \frac{ \sqrt{7} + 1}{ \sqrt{7} + 1} \\ = > \frac{2( \sqrt{7} + 1)}{ \sqrt{7} {}^{2} - 1 {}^{2} } \\ = > \frac{2 \sqrt{7} + 2}{7 - 1} \\ = > \frac{2( \sqrt{7} + 1)}{6} \\ = > \frac{ \sqrt{7} + 1}{3}$

$\color{red}\boxed{\colorbox{skyblue}{Additional Information~}}$

Step 3 contains the algebraic identity

( a + b ) × ( a - b ) = a² - b²

Also.. in the very last step ,

we earlier had 2 multiplied to rest of the numerator and 6 in the denominator..

we simply divided both the numerator as well as denominator by 2 and hence got the result obtained.

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hope helpful~

<h3>~Be Brainly!</h3><h3>~Exhausted Zombie</h3>

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2 years ago

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