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Wewaii [24]
2 years ago
6

Rationalize root 3+root 5​

Mathematics
1 answer:
k0ka [10]2 years ago
6 0

Answer:

- 2

Step-by-step explanation:

To rationalise multiply by its conjugate.

The conjugate of \sqrt{3} + \sqrt{5} is \sqrt{3} - \sqrt{5} then

(\sqrt{3} + \sqrt{5} )(\sqrt{3} - \sqrt{5} ) ← expand using FOIL

= (\sqrt{3} )² - \sqrt{15} + \sqrt{15} - (\sqrt{5} )²

= 3 - 5

= - 2

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On Thursday afternoon at camp Alice played basketball and went swimming before dinner she spent 45 minutes playing basketball an
ivann1987 [24]

Answer:

3:45 PM.

Step-by-step explanation:

We have been given that on Thursday afternoon at camp Alice played basketball and went swimming before dinner she spent 45 minutes playing basketball and one hour swimming dinner lasted for an hour. The dinner ended at 5:30 PM.

Since she spent 1 hour for swimming, so 1 hour before 5:30 PM would be 4:30 PM.

To find the time, when Alice started playing basketball, we need to find 45 minutes before 4:30 PM.

30 minutes before 4:30 PM would be 4:00 PM and 15 minutes before 4:00 PM would be 3:45 PM.

Therefore, Alice started playing basket ball at 3:45 PM.  

7 0
3 years ago
What is extended form for 76.429
Zanzabum
(70x10)+(6x1)+(4x1/10)+(2x1/100)+(9x1/1000)
3 0
3 years ago
30 points!!!Find m A) 5 degrees <br> B) 10 degrees<br> C) 30 degrees <br> D) 40 degrees
Neporo4naja [7]

Answer:

the answer is c

Step-by-step explanation:

the answer is C because m A equals that is you know how too do it

3 0
3 years ago
Can I have help with 42?
Sphinxa [80]
#42.
14n - 32 = 22
add 32 to both sides
14n - 32 + 32 = 22 + 32
simplify
14n = 54
divide both sides by 14
14n/14 = 54/14
simplify
n = 3 12/14
n = 3 6/7 or n = 3.857


8 0
3 years ago
Read 2 more answers
Elimination method<br> 4x-2y=48<br> 2x+6y=-18
yulyashka [42]
4x-2y=48\\ \\ 2x+6y=-18

First we'll multiply the second equation by -2


-2\cdot (2x+6y)=-2\cdot -18\\ \\ -4x-12y=36

Now let's add the new equation and the first one.

(4x-2y)+(-4x-12y)=48+36\\ \\ 4x-4x-2y-12y=48+36\\ \\ -14y=84\\ \\ y=\frac { 84 }{ -14 } \\ \\ y=-6

We found y's value. We'll plug it in one of the equations to find x's value.

y=-6\\ \\ 4x-2y=48\\ \\ 4x-2\cdot -6=48\\ \\ 4x+12=48\\ \\ 4x=48-12\\ \\ 4x=36\\ \\ x=\frac { 36 }{ 4 } \\ \\ x=9

Solution ;

(9, -6)


4 0
3 years ago
Read 2 more answers
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