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Sav [38]
4 years ago
6

20 points!!! first answer gets brainliast. Don't need too much explanation thank you!​

Mathematics
1 answer:
KengaRu [80]4 years ago
8 0

Answer:

The answer to your question is below

Step-by-step explanation:

2. \sqrt{-128}                Just find the prime factors of 128 and simplify

   \sqrt{-2^{7}} = \sqrt{-2^{6} 2} = 2^{3}i \sqrt{2}

   8i\sqrt{2}

3.- \sqrt{-9} + \sqrt{-16}     Get the square roots and simplify

     3i + 4i

     7i

4.- None of the choices is equal to one, because the exponents are pair.

5.- 1/3x² + 10 = 7

    1/3x² = 7 - 10

    1/3x² = -3

         x² = -3(3)

         x² = -9

         x = ±3i

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Fill in the blank to complete the following sentence. The two roots a +sqrt b and a- sqrt b are called ______ radicals.
katrin [286]

The two roots a + sqrt b and a - sqrt b are called conjugate radicals.

<u>Solution:</u>

Given that the two roots a + sqrt b and a - sqrt b are called ______ radicals.

Now let us write the each of the given two radicals in mathematical form.

So, first radical ⇒ a + sqrt b ⇒ a+\sqrt{b}   [ since sqrt means square root]

Now second radical ⇒ a - sqrt b ⇒ a-\sqrt{b}

We have to find the relation between a+\sqrt{b} \text { and } a-\sqrt{b}

Now, if observe a+\sqrt{b}  is conjugate of a-\sqrt{b} \text { as }(a+\sqrt{b})(a-\sqrt{b})=a^{2}-b

[ where radical is eliminated]

Hence, the two roots a +sqrt b and a- sqrt b are called conjugate radicals

4 0
3 years ago
What is the sign of the product (8) × (−23) × ( −21) × (−29)?
anzhelika [568]

Answer:

(8) x (-23) x (-21) x (-29)

= - 112,056.

Step-by-step explanation:

6 0
3 years ago
You are knitting a hat, and you want it to have 2 different colors from the 3 color choices of red, black, and blue. You randoml
Ludmilka [50]

Answer:

\frac{1}{6}

Step-by-step explanation:

Given: Three yarn colors are red, black, and blue

To find: probability that the first color is blue and the second color is red

Solution:

Probability is the chance of occurrence of some event.

Probability = number of favourable outcomes/Total number of outcomes

Probability that the first color is blue = \frac{1}{3}

probability that the second color is red if the first color is blue = \frac{1}{2}

So,

probability that the first color is blue and the second color is red = \frac{1}{3}(\frac{1}{2})=\frac{1}{6}

7 0
3 years ago
The price of a technology stock was $9.83 yesterday. Today, the price fell to $9.74 . Find the percentage decrease.
amid [387]
(9.83-9.74)=0.09
(0.09/9.83)(100)=0.9155645982%
6 0
4 years ago
-4 = 10 + n/2 please i will give brainliest
n200080 [17]

Answer:

n = -28

Step-by-step explanation:

-4 = 10 + n/2

first step, subtract 10 from each side to get:

-14 = n/2

cross-multiply to get:

n = -28

4 0
3 years ago
Read 2 more answers
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