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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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The coordinate of centroid of a triangle whose vertices are (1,3,-2), (4,5,0), (6,3,9) is = ……………….
Dominik [7]

Answer:

C = (\frac{11}{3},\frac{11}{3},\frac{7}{3})

Step-by-step explanation:

Given

(x_1,y_1,z_1) = (1,3,-2)

(x_2,y_2,z_2) = (4,5,0)

(x_3,y_3,z_3) = (6,3,9)

Required

Determine the coordinates of the centroid

Represent the coordinates with C.

C is calculated as follows:

C = (\frac{1}{3}(x_1+x_2+x_3),\frac{1}{3}(y_1+y_2+y_3),\frac{1}{3}(z_1+z_2+z_3}))

Substitute values of x and y in the given equation

C = (\frac{1}{3}(1+4+6),\frac{1}{3}(3+5+3),\frac{1}{3}(-2+0+9}))

C = (\frac{1}{3}(11),\frac{1}{3}(11),\frac{1}{3}(7}))

C = (\frac{11}{3},\frac{11}{3},\frac{7}{3})

<em>The above is the coordinate of the centroid</em>

8 0
3 years ago
I will give you Brainiest if you are right.
Lilit [14]

Answer:

F. Six times a number less nine

This is the only one that doesn't make sense

Sorry if im wrong

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Step-by-step explanation:

<h2>Also check out our you tube channel about math called <em>Evimero Academy</em></h2>

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