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Katyanochek1 [597]
2 years ago
14

Which expression is equivalent to sqrt -108 - sqrt -3

Mathematics
2 answers:
Artyom0805 [142]2 years ago
5 0

sqrt (-108) - sqrt (-3)

sqrt(-1) sqrt(108) - sqrt(-1) sqrt(3)

sqrt(-1)*sqrt(36)*sqrt(3)-sqrt(-1)sqrt(3)

sqrt(-1)sqrt(3) (6-1)

isqrt(3)5

5isqrt(3)

Choice A


xxTIMURxx [149]2 years ago
4 0

answer : Option A

\sqrt{-108} - \sqrt{-3}

first we simplify each square root

The value of square root (-1) = i, to remove negative inside the square root we use 'i'

\sqrt{-108} =\sqrt{-36* 3}= 6i\sqrt{3}

\sqrt{-3} = i\sqrt{3} (we cannot simplify square root (3))

\sqrt{-108} - \sqrt{-3}

6i\sqrt{3} - i\sqrt{3}

Both are like terms, so we subtract it

5i\sqrt{3}

5\sqrt{3} i

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A bracelet is exactly 6.97 cm across from one side to the other, through the center. What is the approximate area of the bracele
Vadim26 [7]

Answer:

≈ 38.14 cm²

Step-by-step explanation:

Diameter of circle= 6.97 cm

Area of circle = ?

  • Area = πr² = πd²/4 =
  • 3.14*(6.97)²/4 ≈ 38.14 cm²
3 0
3 years ago
3/10 divided by -1/3
Snezhnost [94]

Answer:

-9/10

Step-by-step explanation:

  1. Find the LCM of 10 and 3: 30
  2. Alter the numerators to fit the denominators: 3 × 3 = 9, -1 × 10 = -10
  3. Re-write the fractions: 9/30 ÷ -10/30
  4. 9/30 ÷ -10/30 = 9/30 × -30/10
  5. 9/30 × -30/10 = -270/300
  6. -\frac{270}{300} = -\frac{9}{10}  

I hope this helps!

8 0
3 years ago
PLEASE HELP <br><br> y/7=x<br> what is y?
AlekseyPX

Answer:

You can't find y in this way

Step-by-step explanation:

You should know the value of x

But you can say

Y=7x

5 0
2 years ago
5/18 • 3/20 • 6/12 please help
wlad13 [49]

Step-by-step explanation:

1. (5/18) × (3/20)=

(5×3)/(18×20)=

15/360=1/24

2. (1/24) × (6/12)=

1/48

4 0
2 years ago
4x + 5y = 3<br>kx + 15y = 9 find k<br>​
9966 [12]

Answer:

12

Step-by-step explanation:

4x + 5y = 3 ................ (i)

kx + 15y = 9................(ii)

Dividing eqn (ii) by 3, we get,

k/3 x + 5y = 3.............(iii)

Subtracting eqn (iii) by eqn (i), we get,

-4x - k/3 x = 0

or, -(4 - k/3 )x = 0

or, 4 - k/3 = 0/x

or, 4 - k/3 = 0

or, 4 = k/3

or, k = 4*3

:. k = 12 (Ans)

6 0
2 years ago
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