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liubo4ka [24]
3 years ago
11

What is the square root of -1

Mathematics
1 answer:
MAXImum [283]3 years ago
5 0

Answer:

i

Step-by-step explanation:

\sqrt{-1} is the same thing as i, which is an imaginary number.

Since you can't take the square root of negative numbers, we use i to do it.

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The perimeter of this figure is 42.5 cm. Find the area of this figure.
11111nata11111 [884]
The picture in the attached figure

let
AB=x

we know that
perimeter of the figure=10*x
perimeter=42.5 cm
so
42.5=10*x
x=42.5/10
x=4.25 cm

area of the figure=area of rectangle +area of square
area of rectangle=4.25*(4.25*3)----> 54.1875 cm²
area of square=4.25²----> 18.0625 cm²

area of the figure=54.1875+18.0625-----> 72.25 cm²

the answer is
72.25 cm²

3 0
3 years ago
G = {(5, 3), (2, 3), (6, 4)} Is G-1 a function and why?
galben [10]
To get G^-1 all we need to do is flip the points around Example for (5,3) make it (3,5)
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If there are x values that are the same, they MUST have the same y value.
look at the points (3,5) and (3,2) those have the same x but they go to different y values so it is not a function.

You can think about it like this.  Can you go to more than 1 place at the EXACT same time?  Obvious answer is no. Can you have multiple people go to the same room?  Sure that is possible.  Same with functions.  An x value can ONLY go to 1 y value, and many different x values can go to the same y value.
4 0
3 years ago
Will give brainliest What goes on the blank?<br> A ?<br> B?<br> C?<br> D?<br> E?<br> F?
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A will be 360/4
B will be pentagon
C will be 72
D will be hexagon
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3 0
2 years ago
What are the advantages and disadvantages of using a line plot to represent data?
Varvara68 [4.7K]
The advantage is that you can visibly see the difference in the data. Disadvantage of line plots would be that not as appealing. 
3 0
3 years ago
a jewelry store is having a sale. A ring is now reduced to £840. This is a saving of 40% of the original price. Work out the ori
Helen [10]

£1400

A reduction of 40% means that £840 is 60% of the original price

Divide £840 by 60 to find 1% then multiply by 100 to find original price

original price = £840 × \frac{100}{60} = £1400


7 0
3 years ago
Read 2 more answers
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