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3 years ago

10

There are 30 people at an art show, every minute 5 more people arrive, but 3 leave. In how many minutes will there be 80 at the

art show?

1 answer:

vichka [17]3 years ago

4 0

In 15 minutes there will be 80 people at the art show.

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Find the conjugate of 2 - 5i and then calculate the product of the given complex

nlexa [21]

Answer:

The conjugate is 2+5i and the product is 29.

Step-by-step explanation:

The conjugate of a complex number $a+bi$ is $a-bi$

Our complex number is 2-5i.

Here, a = 2 and b = -5

Thus, the conjugate of 2-5i is

$2-(-5i)=2+5i$

Using this rule:

$(a+b)(a-b)=a^{2}-b^{2}$

And the fact that $i^{2} = -1$

We can find the product of any complex number and its conjugate:

$(a+bi)(a-bi)=a^{2} - (bi)^{2}=a^{2} - b^{2} i^{2} = a^{2} + b^{2}$

As our complex number is $2-5i$ , the product with its conjugate will be

$2^{2} + (-5)^{2} =4+25=29$

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3 years ago

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sooo i have a question, the currency in malaysia is the ringgit the exchange rate is apparently $1 for every 4 ringgits . At thi

anastassius [24]

Answer:

20 ringgits.

Step-by-step explanation:

Ratio of $1:4 ringgits

5 * 4=20

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3 years ago

How many ways are there to build a computer password consisting of 5 letters? Letters in a password may be repeated. There are 2

LUCKY_DIMON [66]

21 bc jjrifificucueujeejfhdjeiidfjrorodif

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3 years ago

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Evaluate: (d + 1)(d - 1 + 6) <br> d = 2

Allisa [31]

F(d)=(d+1)(d-1+6)
f(d)=(d+1)(d+5)
f(2)=(2+1)(2+5)
f(2)=(3)(7)
f(2)=21

3 0

3 years ago

I need help plez and thanks

Brilliant_brown [7]

He has a total of $58.19.
1 day = $2.74

58.19/2.74
21.24

You can't have 21.2 days, so you need to round down to 21.

Jim can buy lunch for 21 days before he runs out of money on his account.

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3 years ago

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