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3 years ago

Subtract.

Mathematics

1 answer:

mixas84 [53]3 years ago

7 0

9514 1404 393

Answer:

17 -4i

Step-by-step explanation:

You do this the same way you would if i were a variable.

8-(-4+5i)-(-5-i) = 8 +4 -5i +5 +i = (8 +4 +5) +(-5i +i) = 17 -4i

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jasenka [17]

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3 years ago

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I have 3 digits. If I round to the nearest hundred, I am 200. Multiply my ones digit by 2 and you get my tens digit. Both my one

RUDIKE [14]

Answer:

the answer is 393

Step-by-step explanation:

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3 years ago

Please help me I don’t know the answer

lukranit [14]

Answer:

Step-by-step explanation:

the highest real number stops at 4, which means all the sets of real number are less than 4.

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3 years ago

A line passes through the points A (2,-6) and B (-8,0). What is the slope of the line?

mezya [45]

Answer:

-2/5

Step-by-step explanation:

Your slope should be -2/5

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3 years ago

The director of admissions at Kinzua University in Nova Scotia estimated the distribution of student admissions for the fall sem

Lorico [155]

Answer:

1. 1340

2. Variance = 47200, standard deviation = 217.25556

Step-by-step explanation:

If X is the random variable that give the number of admissions, then the expected number of admissions E[X] for the fall semester is

1080*P(X=1080)+1380*P(X=1380)+1540*P(X=1540) =

1080*0.4+1380*0.1+1540*0.5 = 1340

The variance is defined as

$\sigma^2=E[X^2]-(E[X])^2}$

We have

$E[X^2]=(1080)^2*0.4+(1380)^2*0.1+(1540)^2*0.5=1842800$

whereas

$(E[X])^2=(1340)^2=1795600$

So the variance equals

$\sigma^2=1842800-1795600=47200$

The standard deviation is just the square root of the variance, so, the standard deviation is

$\sigma=\sqrt{47200}=217.25556$

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3 years ago