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3 years ago

PLEASE HELP! What are the real and imaginary parts of the complex number? -7+8i

Mathematics

2 answers:

klio [65]3 years ago

5 0

Answer: The real part is -6

The imaginary part is 2i

Step-by-step explanation:

Elden [556K]3 years ago

5 0

Answer:Final answer is -6

Step-by-step explanation Imaginary part= 2i so the answer would be -6

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How many terms are in this expression? b+8+2a

Grace [21]

Answer:

There are three terms in this expression.

Step-by-step explanation:

b is your first term

8 is your second term

Even though the next term is 2a it is still a single term making it your third and final term.

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3 years ago

Adrian scored a total of 34 points in the first 4

Liula [17]

Answer:

153 points.

Step-by-step explanation:

i divided 34 by 4 to get the points he gets each game which is 8.5 then you go 8.5x18 that gives you 153

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3 years ago

Jose has 7 used stamps for every 4 new stamps. If he has 28 new stamps, how many used stamps does he have?

kipiarov [429]

Answer:

Step-by-step explanation:

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2 years ago

Jayla ate 75% of the jelly beans in the bag. If she ate 24 jelly beans how many were in the bag?

maksim [4K]

Answer:

32 jelly beans were in the bag

Step-by-step explanation:

We know 75% is 3/4 and that she ate 24, so divide 24 by 3 then multiply it by 4:

24/3= 8

8 x 4 = 32

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3 years ago

At a Noodles & Company restaurant, the probability that a customer will order a nonalcoholic beverage is .51.

satela [25.4K]

Answer:

$P(x\geq 7)=0.1886$

Step-by-step explanation:

The variable x, that said the number of customer that will order a nonalcoholic beverage in a sample of n customers follows a binomial distribution. Because we have n identical and independent events with a probability p of success and (1-p) of fail.

So, the probability that x customers will order a nonalcoholic beverage is:

$P(x)=\frac{n!}{x!(n-x)!}*p^{x}*(1-p)^{n-x}$

Where n is the size of the sample and p is the probability that a customer order a nonalcoholic beverage, so replacing the values, we get:

$P(x)=\frac{10!}{x!(10-x)!}*0.51^{x}*(1-0.51)^{10-x}$

Now, the probability that at least 7 will order a nonalcoholic beverage is equal to:

$P(x\geq 7)=P(7)+P(8)+P(9)+P(10)$

Where:

$P(7)=\frac{10!}{7!(10-7)!}*0.51^{7}*(1-0.51)^{10-7}=0.1267\\P(8)=\frac{10!}{8!(10-8)!}*0.51^{8}*(1-0.51)^{10-8}=0.0494\\P(9)=\frac{10!}{9!(10-9)!}*0.51^{9}*(1-0.51)^{10-9}=0.0114\\P(10)=\frac{10!}{10!(10-10)!}*0.51^{10}*(1-0.51)^{10-10}=0.0011$

So, $P(x\geq 7)$ is equal to:

$P(x\geq 7)=0.1267+0.0494+0.0114+0.0011\\P(x\geq 7)=0.1886$

Finally, the probability that in a sample of 10 customers, at least 7 will order a nonalcoholic beverage is equal to 0.1886

5 0

3 years ago