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Jobisdone [24]
3 years ago
15

Which of the following is a conjugate for 7 + iSquare root of 2?

Mathematics
2 answers:
Mice21 [21]3 years ago
7 0

Answer:

7 - i\sqrt{2}

Step-by-step explanation:

Given a complex number a ± bi then the complex conjugate is

a ∓ bi

Note that the real part remains the same while the sign of the coefficient of the imaginary part is the opposite

Hence conjugate of 7 + i\sqrt{2} is 7 - i\sqrt{2}


Orlov [11]3 years ago
4 0
7- i square root of 2

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Two computers working together can finish a search in 30 seconds. One of these computers can finish in 50 seconds. How long woul
vivado [14]
It would take the second computer 75 seconds because:

\frac{1}{30} - \frac{1}{50} = \frac{1}{75}
6 0
3 years ago
group of 30 students from your school is part of the audience for a TV game show the total number of people in the audience is 1
Soloha48 [4]
<h2>Answer:</h2><h2>The theoretical probability of four students from your school being selected as contestants out of 8 possible contestants spots =  \frac{14}{165}</h2>

Step-by-step explanation:

The number of students participated  = 30

Total audience = 150

By probability , to find the solution = \frac{n(E)}{n(S)}  

where n(E) is the number of favorable outcomes,

n(S) is the number of total outcomes.

 n(S) is the number of ways any 8 students can by picked from the audience=  \frac{8}{140}

 n(E) is the probability of picking four students from our school and five students from another school.

n(E) = (\frac{4}{30}) (\frac{4}{110}) = \frac{16}{3300}

\frac{n(E)}{n(S)}  = \frac{\frac{16}{3300}}{\frac{8}{140}} = \frac{14}{165}

7 0
3 years ago
What is the value of C and D?
Crazy boy [7]
C is the value and d is not
3 0
3 years ago
About how long would it take for a person to create 4 tons or 8,000 pounds of garbage?
yuradex [85]

Answer: 10 years I think

Step-by-step explanation:

4 0
3 years ago
The length of a rectangle is 8 cm greater than its width. Find the dimensions of the rectangle if its area is 105 square centime
Nikitich [7]

Answer:

105 = (w+8) *w

w = 7 cm

l = 15 cm

Step-by-step explanation:

Area of a rectangle is

A = l*w

l = w+8

105 = (w+8) *w

Distribute

105 = w^2 +8w

Subtract 105 from each side

105-105 = w^2 +8w -105

0 =w^2 +8w -105

Factor

What 2 number multiply to 105 and add to 8

15*-7 = -105

15-7 = 8

(w+15) (w-7) =0

Using the zero product property

w+15 =0               w-7 =0

w=-15                      w=7

impossible

not negative

w =7

l = 15

7 0
3 years ago
Read 2 more answers
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