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____ [38]
3 years ago
6

Someone please help me by tonight I'm trying not to fail math. Also I will Brainliest if you help me get the right answer please

just help me.
1. What is the product of the complex numbers (3+i) and (3-i)?
A. 10-6i
B.9-i
C.8
D.10

2. Which expression Represents (-3-2i)-(5+i)?
A.-8-i
B.-8-3i
C.2-i
D.2-3i


3. What is the sum of the complex numbers (12-5i) and (-3+4i)?
A. 15-9i
B.9-i
C.9-9i
D.-16+63i

4. Which expression is equivalent to (6-2i)(2-3i)?
A. 6+22i
B. 18+22i
C. 6-22i
D. 18-22i

5. Simplify: (2+6i)-(3-5i)-(5-3i)
A. -4+16i
B. -6+14i
C. -6-2i
D. -4-4i

6. Which expression below is equivalent to 4i(12-7i)
A. -28+48i
B. -48+28i
C. 48+28i
D. 28+48i

7. Add √ -4+√-49
A. -9i
B. 5+I
C. 5-i
D. 9i​
Mathematics
1 answer:
vredina [299]3 years ago
6 0

Answer:

1. answer is D

2. Answer is D

3.Answer is B

4. Answer is C

5. Answer is B

6. Answer is D

7.Answer is D

Step-by-step explanation:

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A farmer wants to use 200 feet of fencing for a chicken pen. He wants the width of the pen to be 20 feet. What is the length of
Aneli [31]
The length should be 80 feet.

This is because the width is 20, since there are two sides for the width in a pen, we have to add 20+20. This would equal 40. Then we need to subtract 40 from 200. 200-40 would be 160. Then since there are two sides for the length, we need to split that in half. 160÷2 would be 80. To double check, you can do 80+80 and that would still be 160. So the length of one side would be 80. But of course, this whole thing would only be right if the pen has four sides(but since i have seen many chicken pens, there were all rectangular). I hope this helped! :)
7 0
3 years ago
Your aunt gives you $50 to help buy the reflector telescope shown. After you buy the telescope, you have $35.50. How much money
disa [49]

Answer:

$0?

Step-by-step explanation:

Sorry I'm very confused by this question

8 0
3 years ago
Read 2 more answers
In your own words, describe slope.
tiny-mole [99]

Answer:

it is a downward

discline

Step-by-step explanation:

4 0
3 years ago
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A regular pentagonal prism has a volume of 2,850 cubic millimeters. what is the height of the prism? a regular pentagonal prism
zlopas [31]

Answer:

Height = 19mm.

Step-by-step explanation:

Area of a regular polygon =  (A * P) / 2 where A = side / (2 * Tan (π / N)) where, N = Number of sides, A = Apothem,  P = Perimeter.

Here A = 5, P = 5*12 = 60 so

Area  of the base  = (5 * 60) / 2 = 150 mm^2.

Volume = area base * height so

Height = volume / area of base

            = 2850 / 150

            = 19 mm.

5 0
1 year ago
Find the mean absolute deviation for the data set.<br> 5,6,6,8,10
alukav5142 [94]

Answer: 1.6

<u>Order the numbers</u>

5,6,6,8,10

<u>Add</u>

5+6+6+8+10=35

<u>Divide</u>

35÷5=7

Mean: 7

Sum divided by the count.

Final Answer: 1.6

6 0
3 years ago
Read 2 more answers
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