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ludmilkaskok [199]
2 years ago
12

On a coordinate plane, a line is drawn from point j to point k. point j is at (negative 15, negative 5) and point k is at (25, 1

5). what are the x- and y- coordinates of point e, which partitions the directed line segment from j to k into a ratio of 1:4? x = (startfraction m over m n endfraction) (x 2 minus x 1) x 1 y = (startfraction m over m n endfraction) (y 2 minus y 1) y 1 (–13, –3) (–7, –1) (–5, 0) (17, 11)
Mathematics
1 answer:
Genrish500 [490]2 years ago
7 0

The required x- and y- coordinates of point e, which partitions the directed line segment is (17, 11)

<h3>Midpoint of coordinates</h3>

The middle point of two coordinates is known as its midpoint. The formula for calculating the midpoint of a coordinate is expressed as:

m(x,y)=(\frac{mx_1+nx_2}{m+n},  \frac{my_1+ny_2}{m+n})

Given the coordinate points J(-15, -5) and k(25, 15) partitioned in the ratio 1:4, the x- and y- coordinates of point e, which partitions the directed line segment is given as:

m(x,y)=(\frac{1(-15)+4(25)}{1+4},  \frac{1(-5)+4(15)}{1+4})\\m(x,y)=(\frac{85}{5}, \frac{55}{5} )\\m(x, y) = (17,11)

Hence the required x- and y- coordinates of point e, which partitions the directed line segment is (17, 11)

Learn more on midpoint here: brainly.com/question/5566419

#SPJ4

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12. If a manufacturer conducted a survey among randomly selected target market households and wanted to be 95% confident that th
atroni [7]

Answer:

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11  

And rounded up we have that n=1068

Step-by-step explanation:

We have the following info given:

Confidence= 0.95 the confidence level desired

ME =0.03 represent the margin of error desired

The margin of error for the proportion interval is given by this formula:  

ME=z_{\alpha/2}\sqrt{\frac{\hat p (1-\hat p)}{n}}    (a)  

The confidence level is 95% or 0.95, the significance is \alpha=0.05 and the critical value for this case using the normal standard distribution would be z_{\alpha/2}=1.96

Since we don't have prior information we can use \hat p= 0.5 as an unbiased estimator

Also we know that ME =\pm 0.03 and we are interested in order to find the value of n, if we solve n from equation (a) we got:  

n=\frac{\hat p (1-\hat p)}{(\frac{ME}{z})^2}   (b)  

And replacing into equation (b) the values from part a we got:

n=\frac{0.5(1-0.5)}{(\frac{0.03}{1.96})^2}=1067.11  

And rounded up we have that n=1068

6 0
3 years ago
Someone please help
AleksandrR [38]

Replace y with 31:

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Add 4 to both sides:

35 = 7x

Divide both sides by 7:

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Input x = 5

6 0
2 years ago
There is a bag with only red marbles and blue marbles.The probability of randomly choosing a red marble is59.There are 63 marble
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Answer:

37

Step-by-step explanation:

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7 0
3 years ago
Find the height of a square pyramid with volume 37.3 ft3 and dimensions of base 4 ft by 4 ft. Please help!
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6 0
3 years ago
Read 2 more answers
Prove that there exists a unique real number solution to the equation x3 + x2 − 1 = 0 between x = 2/3 and x=1
ziro4ka [17]
Replace each of the x values given to see if they give 0. 

0=(2/3)³+(2/3)²-1 
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0=(1)³+(1)²-1 
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Therefore, you can see that the solution would have to be between 2/3 and 1.

Hope I helped :) 
7 0
3 years ago
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