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White raven [17]
3 years ago
6

Simpilify the expresssion 2+3i/4+3i

Mathematics
1 answer:
Eddi Din [679]3 years ago
3 0
Multiply the numerator and denominator by 4+5i
=[(2+3i)(4+5i)]/[(4-5i)(4+5i)] 
=[(8-15)+(12+10)i] / [16+25] <span>= [ -7 + 22i ] / [41] 
= (-7/41) + (22/41)i </span>
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Suppose a jar contains 5 red marbles and 25 blue marbles. If you reach in the jar and pull out one marble at random, do not repl
dsp73

Answer:

Probability that event will have both red marbles will be 2.3% or 0.023.

Step-by-step explanation:

Given:

Total red marbles=5

Total blue marbles=25

Total number of marbles =30

To Find:

The probability that both are red without replacement of marbles.

Solution:

Now

Total sample space is 30 and total red marbles are 5

For a event that getting red marble probability is ,

=Total red marbles /total marbles.

=5/30

=1/6

So probability if getting red marble is 1/6

<em>Now for second chance there will be 4 red marbles remaining and 29 total marbles so,</em>

In second chance  probability if getting red marble will be

=total red marbles present/total marbles remaining

=4/29

Now ,

The required probability will be getting both at a time

i.e probability getting red AND red marble so here AND operator which means multiple both the probability.

Probability both will have red =1/6*4/29

=4/(29*6)=2/(29*3)

=0.022988

=0.023

=2.3 %

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3 years ago
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Answer:

a. 80

b. 34

Step-by-step explanation:

45 percent of 80 is 36.

85 percent of 40 is 34.

You can find these online, through a Percentages Calculator.

<u><em>Have a good day and a good rest of 2021. :) Please feel free to give me Brainliest if you feel this helped. It's up to you though :)</em></u>

6 0
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