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Sedbober [7]
3 years ago
9

Need step-by-step. Please answer correctly. This determines what grade I get. I will mark brainliest to the first person who ans

wers with a step-by-step explanation. Need fast!
I got 3√3 but it is not an answer choice.

Mathematics
1 answer:
tatyana61 [14]3 years ago
3 0

Answer:

  3√3

Step-by-step explanation:

For the problem shown here, your answer 3√3 is correct.

When there is a radical by itself in the denominator, you multiply numerator and denominator by a radical that results in the product being rational. For a square root, that will usually be the same square root:

  \dfrac{9}{\sqrt{3}}=\dfrac{9}{\sqrt{3}}\cdot\dfrac{\sqrt{3}}{\sqrt{3}}=\dfrac{9\sqrt{3}}{3}=\boxed{3\sqrt{3}}

__

If the problem has a sum in the denominator involving a square root, then you multiply numerator and denominator by the conjugate of that sum (the sum with the sign changed). This uses the special product "difference of squares" to eliminate the radical term.

<u>Example</u>:

  \dfrac{9}{2-\sqrt{3}}=\dfrac{9}{2-\sqrt{3}}\cdot\dfrac{2+\sqrt{3}}{2+\sqrt{3}}=\dfrac{9(2+\sqrt{3})}{2^2-(\sqrt{3})^2}=\dfrac{18+9\sqrt{3}}{4-3}\\\\=\boxed{18+9\sqrt{3}}

__

It is easy to demonstrate that none of the offered choices for this problem has the same value as 9/√3.

9/√3 ≈ 5.196. Offered choices have values of about 4.798, 1.732, 6.681, 23.196 -- none even close.

Please discuss this question with your teacher.

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SVEN [57.7K]
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Hope I helped!


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4 0
3 years ago
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A triangle has side lengths of 33 inches, 77 inches, and c inches
Rus_ich [418]
It's 3.74 rounded up to 4  the reason why it is that answer is because the formula to a triangle's Hypotenuse is A squared + B squared =  C squared 
4 0
3 years ago
Write the statement as an algebraic expression.
Firdavs [7]

Answer:

(c^{2}+d)+2(cd)

Step-by-step explanation:

we know that

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(c^{2}+d)

The algebraic expression of the phrase " The sum of square of c and d increased by twice their product" is equal to

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7 0
3 years ago
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What is the value of x
Kisachek [45]

Answer:

x=98

Step-by-step explanation:

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4 0
3 years ago
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Please help me out and show work
lina2011 [118]

Answer:

s(x)=\frac{0.2}{x+5}

Step-by-step explanation:

In 5 liters, there is 4% salt.

Lets find liters of salt.

First, converting 4% to decimal (dividing by 100):

4% = 4/100 = 0.04

0.04 * 5 = 0.2

So, there is 0.2 liters of salt.

Now, x liters of water is added to total, so total is now:

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The concentration of salt will be amount of salt divided by amount of salt water solution.

Amount of salt = 0.2 (as seen above)

Amount of new salt water solution = x + 5

So,

Concentration of salt in new solution is  \frac{0.2}{x+5}

2nd choice is right.

4 0
3 years ago
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