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Marta_Voda [28]
2 years ago
8

Can somebody help me please?

Mathematics
1 answer:
Nina [5.8K]2 years ago
7 0

Answer:

it's a that's the answer

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Rationalize the denominator of square root of negative 49 over open parentheses 7 minus 2 i close parentheses minus open parenth
navik [9.2K]

The answer is the option d, which is: d) \frac{-77+21i}{130}

The explanation for this problem is shown below:

1. Smplify the denominator and rewrite the numerator in this form:

\frac{7i}{7-2i-4-9i} \\\frac{7i}{3-11i}

2. Multiply the denominator and the numerator by the conjugated (3+11i) and simplify the expression, as following:

\frac{7i(3+11i)}{(3-11i)(3+11i)} \\ \frac{21i+77i^{2}}{121+9}  \\ \frac{-77+21i}{130}

3. As you can see, you obtain the expression shown in the option mentioned above.

3 0
4 years ago
Need help
sveta [45]

Answer:

20

Step-by-step explanation:

25 + 7x = 165

25 + 7(20) = 165

25 + 140 = 165

6 0
3 years ago
What is the volume of the cylinder
evablogger [386]
The answer is the first option, you multiply 14^2 by 9
4 0
4 years ago
Please help me do this i’ll give brainlist and points
lorasvet [3.4K]

To make enough brew for 4 people you would need:

3 frogs

4 1/2 cups of sour milk

14 gerbil tails

52 crickets

2/3 cup of eyeballs

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<em>Have a luvely day!</em>

3 0
3 years ago
Find the area of the blue sector of the circle. Round to the nearest hundredth.
Varvara68 [4.7K]
A diagram must be associated with the question above. Based on what I researched, this is what I got.

The blue sector of the circle is 120 degrees.

area of the blue sector = 1/3  of pi * 2^2
                                     = 4.19cm2

I hope this answer helps.
8 0
3 years ago
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