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Elenna [48]
3 years ago
14

PLEASE HELP ME WITH THIS!!!!!!!!!!!

Mathematics
1 answer:
torisob [31]3 years ago
3 0

Answer:

7. 76.7

8. 12.6

Step-by-step explanation:

Let me know in the comments if you want me to explain :)

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which expression represents purely real numbers and which expression represents non-real complex number?​
Lyrx [107]

Answer:

Step-by-step explanation:

Complex numbers are the numbers represented by the expression = a + bi

Here a = real part of the number

bi = imaginary part

a and b are the real numbers.

i^9=(i^2)^4.(i)

    =(-1)^{4}.i [Since, i^2=-1]

    =i

Therefore, its a non real complex number.

2 - \sqrt{-49} = 2-\sqrt{(-1)(7)^2}

               = 2-7\sqrt{-1}

               = 2-7i

This number is a Non real complex number.

\sqrt{(-18)^2}=18\sqrt{-1}

              = 18i

It's a non real complex number.

3 + 2i

It's a non real complex number.

-289

It's a purely real number.

4-32i^2=4-32(-1)

             = 4 + 32

             = 36

It's a purely real number.

6 0
3 years ago
SOMEONE HELP ME PLEASE!!!!!!
vaieri [72.5K]
Answer: Choice C

The non-pencil part of the compass is placed at point G. The compass must be kept the same width that was used to form the arc shown. The idea is to draw another arc so that it starts above G (so its on the opposite side of point A) and traces out a similar path as the arc in the diagram. 

Check out the attached image to see what I mean. The new second arc is shown in red.

3 0
3 years ago
deenas water bottle can hold a total of 2/5 liter of water. johns water bottle can hold a total of 5/2 liter of water whose wate
Alexandra [31]
John's. Find the first common multiple of both denominators, in this case it's going to be ten, then the number you had to multiply to change these numbers to the common multiply you do to the numerators. so it works out like so:

Deena has a bottle of 4/10
John has a bottle of 25/10 or 2 1/2 (simplified)
8 0
3 years ago
Read 2 more answers
Please help asap!!!
erik [133]
D-A-C-B should be the order
i really hope this helps
6 0
3 years ago
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The next model of a sports car will cost 12.7% less than the current model. The current model costs $49,000 . How much will the
Wittaler [7]
Percentage of a number.

$49,000 x .127 = $6,223 is the decrease
$49,000 - $6,223 = $42,777
4 0
3 years ago
Read 2 more answers
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