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3 years ago

Which number is irrational -9/5 , square root of 5 , 7/3 or square root of 9

Mathematics

1 answer:

miv72 [106K]3 years ago

8 0

sry if my answer is wrong but I think it is the square root of nine

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Can someone please help with this math question:)

Bingel [31]

Solution:

The rationalisation factor for $\frac{1}{ a - \sqrt{b} }$ is $a + \sqrt{b}$

So, let us apply it here.

$\frac{1}{5 - \sqrt{2} }$

The rationalising factor for 5 - √2 is 5 + √2.

Therefore, multiplying and dividing by 5 + √2, we have

$= \frac{1}{5 - \sqrt{2} } \times \frac{5 + \sqrt{2} }{5 + \sqrt{2} } \\ = \frac{5 + \sqrt{2} }{(5 - \sqrt{2})(5 + \sqrt{2} ) } \\ = \frac{5 + \sqrt{2} }{ {(5)}^{2} - ( \sqrt{2})^{2} } \\ = \frac{5 + \sqrt{2} }{25 - 2} \\ = \frac{5 + \sqrt{2} }{23}$

Answer:

$\frac{5 + \sqrt{2} }{23}$

Hope you could understand.

If you have any query, feel free to ask.

5 0

2 years ago

Read 2 more answers

PLZ HELP

nasty-shy [4]

Answer:

do u need other coordinates?

if so B'(1,-1)

C'(1,4)

D'(5,6)

the formula is (-x,y)

hope it helps :)

7 0

2 years ago

Which equation has infinitely many solutions?

Umnica [9.8K]

Answer: B

Step-by-step explanation:

$\dfrac{10x+8}{2} =5x+4\ cross\ products\\\\10x+8=10x+8\\\\0x=0\\$

Every real is solution of the equation .

8 0

2 years ago

What is (9^4)^2? And what is (6^1)^0?

Alexandra [31]

Answer:

hhhhgvguhvibjhvgyvv

Step-by-step explanation:

bhufyhg88

8 0

3 years ago

You roll a standard number cube once. Find p (number lass than 7).

wel

Answer:

the probability of getting a number less than 7 when rolling a standard dice is 100%

Step-by-step explanation:

7 0

3 years ago