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Jet001 [13]
3 years ago
15

Which set of polar coordinates describes the same location as the rectangular coordinates (4,-4)

Mathematics
2 answers:
lyudmila [28]3 years ago
8 0
R=4
theta=pi/2

x= r cos(theta) = 4 cos(pi/2) = 4(0) = 0
y = r sin(theta) = 4 sin(pi/2) = 4(1) = 4

(0,4) is the answer.
SOVA2 [1]3 years ago
3 0

Answer:

(4 sqrt2, 315 degrees)

Step-by-step explanation:

apex

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Which of the following expressions is equal to 3x^2 + 27
Kisachek [45]
Factor: 
3x^2 + 27
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Answer is 3(x^2 + 9), when factored.


A) (3x + 9i)(x + 3i)
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B) (3x - 9i)(x + 3i)
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C) (3x - 6i)(x + 21i)
= (3x +  - 6i)(x + 21i)
= (3x)(x) + (3x)(21i) + (- 6i)(x) + ( -6i)(21i)
= 3x^2 + 63ix - 6ix - 126i^2
=  - 126i^2 + 57ix + 3x^2






D) (3x - 9i)(x - 3i)
=  (3x +   - 9)(x +  - 3)
= (3x)(x) + (3x)( - 3i) + (- 9)(x) + ( - 9)( - 3i)
= 3x^2 - 9ix - 9x + 27i
= 9ix + 3x^2 + 27i - 9x









Hope that helps!!!

8 0
3 years ago
Read 2 more answers
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Lunna [17]

Answer:

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Step-by-step explanation:

The mode is the value that appears most frequently in a data set. A set of data may have one mode, more than one mode, or no mode at all. ... The mode can be the same value as the mean and/or median, but this is usually not the case

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Step-by-step explanation:

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Answer:

Step-by-step explanation:

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