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2 years ago

What is the sum of 15 – 6i and –2 + 9i?

Mathematics

2 answers:

GaryK [48]2 years ago

5 0

Answer:

Sum is 13 +3i .

Step-by-step explanation:

Given :15 – 6i and –2 + 9i

To find :What is the sum

Solution : We have given 15 – 6i and –2 + 9i

On adding the terms

15 – 6i + (–2 + 9i)

15 – 6i –2 + 9i

On combine real part and complex part.

15 -2 - 6i + 9i.

13 +3i

Therefore, Sum is 13 +3i .

shtirl [24]2 years ago

3 0

3i + 13 is the sum of the numbers

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Answer:

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2 years ago

Which quadratic equation has solutions x=8 and x=−1?

andrezito [222]

There are two ways you can do this

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$Working backwards$

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3 years ago

What is 121 rounding to the nearest 100 and what is 252 rounding to the nearest 100

joja [24]

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3 years ago

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The area of the surface of the swimming pool is 210 square feet. What is the length d of the deep end (in feet)?

luda_lava [24]

The answer is 3.16 ft

The surface area (SA) of the rectangular prism is:
SA = 2lw + 2ld + 2wd

However, the pool is without the top side, so the area of the top side should be excluded from the surface area of the pool. The surface area of the rectangular pool is:
SA = lw + 2ld + 2wd

We know:
SA = 210 ft²
l = 9 ft
w = 10 ft
d = ?

210 = 9 * 10 + 2 * 9 * d + 2 * 10 * d
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120 = 38d
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2 years ago