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disa [49]
3 years ago
6

A(-3, -2) and B(6, 1), determine the coordinates of point P on directed line segment stack A B with bar on top that partitions s

tack A B with bar on top in a ratio of 2:1
Mathematics
1 answer:
Bad White [126]3 years ago
3 0

Answer:

P(3,0)

Step-by-step explanation:

We want to find the coordinates of P(x,y), that partitions \overline{AB} in the ration m:n=2:1.

where (x_1,y_1)=A(-3,-2) and (x_2,y_2)=B(6,1).

This is given by:

x=\frac{mx_2+nx_1}{m+n}

y=\frac{my_2+ny_1}{m+n}

We substitute the values to get:

x=\frac{2*6+1*-3}{2+1}

x=\frac{9}{3}=3

y=\frac{2*1+1*-2}{2+1}

y=\frac{2-2}{2+1}

y=\frac{0}{3}=0

The coordinates are (3,0)

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The lengths of pregnancies are normally distributed with a mean of days and a standard deviation of days. a. Find the probabilit
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Answer:

a) The probability of a pregnancy lasting X days or longer is given by 1 subtracted by the p-value of Z = \frac{X - \mu}{\sigma}, in which \mu is the mean and \sigma is the standard deviation.

b) We have to find X when Z has a p-value of \frac{a}{100}, and X is given by: X = \mu - Z\sigma, in which \mu is the mean and \sigma is the standard deviation.

Step-by-step explanation:

Normal Probability Distribution

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.

In this question:

Mean \mu, standard deviation \sigma

a. Find the probability of a pregnancy lasting X days or longer.

The probability of a pregnancy lasting X days or longer is given by 1 subtracted by the p-value of Z = \frac{X - \mu}{\sigma}, in which \mu is the mean and \sigma is the standard deviation.

b. If the length of pregnancy is in the lowest a​%, then the baby is premature. Find the length that separates premature babies from those who are not premature.

We have to find X when Z has a p-value of \frac{a}{100}, and X is given by: X = \mu - Z\sigma, in which \mu is the mean and \sigma is the standard deviation.

8 0
3 years ago
(a+b)²=?ahihihihihihihihihihihihi
aleksandr82 [10.1K]

Answer:

(a+b)²=a²+2ab+b²

Step-by-step explanation:

Hope this helps!!!

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makvit [3.9K]

ANSWER

1. Multiply the fraction by 5/5 to get a denominator of 100 and then write the numerator as hundredths using a decimal point.

EXPLANATION

Renaldo wants to write

\frac{3}{20}

as a decimal.

He needs a denominator of 100, so he can multiply by

\frac{5}{5}

to obtain:

\frac{3}{20}  =  \frac{3 \times 5}{20 \times 5}

This will be

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He can now obtain the decimal equivalent as

= 0.15

The correct choice is option 1.

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