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anzhelika [568]
3 years ago
8

Help me pretty please

Mathematics
1 answer:
jeyben [28]3 years ago
8 0

Answer:

576 cm2

Step-by-step explanation:

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8
tia_tia [17]

Answer:

8-6i

Step-by-step explanation:

Multiply out (3-i)^2 in order to find out which expression it is equivalent to.

1) Since the whole quantity is squared, write it out as (3-i)(3-i).

(3-i)^2\\(3-i)(3-i)

2) Multiply binomials by using the FOIL method. Multiply the terms that are listed first in each binomial, then the ones that are listed outermost when looking at both binomials, then innermost, and finally the last terms listed in each binomial. Simplify and combine like terms.

(3-i)(3-i)\\9 - 3i - 3i + i^2

9 - 6i + i^2

3)  i = \sqrt{-1}, so i ^2 must be (\sqrt{-1} )(\sqrt{-1}). Thus, i^2 is equivalent to -1. Knowing this, simplify and combine like terms.

9 - 6i + ((-\sqrt{1} )(\sqrt{-1} ))

9 - 6i -1\\8 - 6i

Thus, it is equivalent to  8 - 6i .

6 0
3 years ago
In a 30°- 60° - 90° right triangle, the longer leg has a length of 10 square root of 3. what is the length of the shorter leg?
shutvik [7]
In a 30°-60°-90° triangle, the longer leg is √3 times the shorter leg. In your triangle, ...
  the shorter leg is 10.
3 0
3 years ago
Please answer quick!
tatuchka [14]
4 * (25 * 1.2) = (4 * 25) * 1.2
3 0
3 years ago
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What are two decimals close two 6.3
WITCHER [35]

Answer:

6.2 and 6.4

Step-by-step explanation:

I am right please like

5 0
3 years ago
Find the median of these numbers:4,2,7,4,3 *
sattari [20]

Answer:

The Median of those numbers is 4

Step-by-step explanation:

3 0
3 years ago
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