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3 years ago

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Mathematics

1 answer:

gayaneshka [121]3 years ago

8 0

Answer:

The 8 should have remained positive.

Step-by-step explanation:

8-(-2)=8+2=10

Two negatives make a positive so 8-(-2) will turn into 8+2.

Laura was wrong because she thought the 8 turned to a negative but that makes no sense.

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Find the conjugate of -2 + 3i.

Charra [1.4K]

Answer:

- 2 - 3i

Step-by-step explanation:

given a complex number a + bi

then the conjugate is a - bi

The real part a remains unchanged while the sign of the imaginary part is reversed.

the conjugate of - 2 + 3i is - 2 - 3i

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3 years ago

-2 2/3, -5 1/3, -10 2/3, -21 1/3, -42 2/3. which formula can be used to describe the sequence?

Stella [2.4K]

Your sequence appears to be geometric with a common ratio of 2. It can be described by
a(n) = (-2 2/3)·2^(n-1)

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This can be written in a number of other forms, including
a(n) = (-8/3)·2^(n-1)
a(n) = (-1/3)·2^(n+2)
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3 years ago

How much is 2/7 of 1 and 3/4

rodikova [14]

The answer is 0.5 cool

8 0

3 years ago

Read 2 more answers

What is 7 1/4 + 15 7/8 in fraction form

Eva8 [605]

23 1/8

(7+15) + (1/4 +7/8)
22 + 2/8 + 7/8
22+ 9/8
23 1/8

5 0

2 years ago

Find the Total Surface area of a Pyramid. Its base is a regular hexagon 4cm on a side. its height is 8 cm. Round off to nearest

oksano4ka [1.4K]

Answer:

The total surface area of a regular hexagonal pyramid is 146.2 cm².

Step-by-step explanation:

The base is a regular hexagon 4cm on a side. its height is 8 cm.

The total surface area of a pyramid with regular hexagon base

$A=\frac{3\sqrt{3}}{2}a^2+3a\sqrt{h^2+\frac{3a^2}{4}$

Where, a represents the base edge and h represents the height of the pyramid.

The area of given regular hexagonal pyramid is

$A=\frac{3\sqrt{3}}{2}(4)^2+3(4)\sqrt{(8)^2+\frac{3(4)^2}{4}$

$A=\frac{3\sqrt{3}}{2}(16)+12\sqrt{64+12}$

$A=24\sqrt{3}+12\sqrt{76}$

$A=146.182794027$

$A=146.2$

The total surface area of a regular hexagonal pyramid is 146.2 cm².

8 0

3 years ago