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erastovalidia [21]
3 years ago
6

I need help on this please

Mathematics
1 answer:
Misha Larkins [42]3 years ago
5 0

Answer:

B. R/3

Step-by-step explanation:

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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.

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4 years ago
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qaws [65]
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3 years ago
What is the solution to 4(3x−5)=−80? x=−5 x=5 x=−253 x=253
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Step-by-step explanation:

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3 years ago
Lynnette can wash 959595 cars in 5 days.<br> How many cars can Lynnette wash in 11 days?
aleksley [76]

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Lynnette can wash 2111109 in 11 days

Step-by-step explanation:

Have a good day :)

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3 years ago
The normal curve with a mean of 0 and standard deviation of 1 is called?
Schach [20]

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A normal distribution with a mean of 0 and a standard deviation of 1 is called a standard normal distribution. so its A

Step-by-step explanation:

i looked it up and i think this is right :)

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