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Vesna [10]
3 years ago
8

Select the correct answer.

Mathematics
1 answer:
wolverine [178]3 years ago
7 0

Answer:

A. -4 + 6i

Step-by-step explanation:

Cause as we can see... (-2 - 2i)+(10-4i)

We get when we multiply 2x2=4i

Next 10-4=6

Hope it helped u

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A chord is 10cm from the centre of a circle of radius 15cm. Find the length of the chord.
almond37 [142]

Answer: 21.44 cm

Step-by-step explanation:

Given

Radius r=15 cm

distance of chord from the center is 10 cm

From the figure, the length of the chord is AC

Applying Pythagoras

\Rightarrow AO^2=OB^2+AB^2\\\Rightarrow AB^2=15^2-10^2\\\Rightarrow AB^2=225-100=115\\\Rightarrow AB=\sqrt{115}=10.72\ cm

The length of the chord is AC=2AB=21.44\ cm

5 0
3 years ago
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zubka84 [21]

Step-by-step explanation:

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2 years ago
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Inessa05 [86]
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Hope this helps!! :3
(If not, sorry)
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