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jek_recluse [69]
3 years ago
6

Can some one please help me will give 94 points for it

Mathematics
2 answers:
NNADVOKAT [17]3 years ago
7 0
You can solve this by using "similar triangles".

In triangle ABC, we are looking for side AC which is x. Side AC is similar to side DF in triangle EDF.

You can solve for side x by picking two sides in triangle ABC and their corresponding sides in triangle EDF. This is what I mean:
\frac{AC}{BC} =  \frac{DF}{EF}
Substitute for the values of AC, BC, DF and EF:
\frac{x}{4}  =  \frac{11}{8}  \\  \\ 8x = 4 \times 11 \\  \\ x =  \frac{44}{8}
x = 5.5 \: units
To solve for y, do the same thing. Pick two sides on triangle ABC and their corresponding sides in triangle DEF.
\frac{AB}{BC}  =  \frac{DE}{EF}
Substitute for the values and solve:
\frac{3}{4}  =  \frac{y}{8}
4y = 24 \\  \\ y = 6 \: units

We have the value x to be 5.5 units and y to be 6 units.

Step2247 [10]3 years ago
3 0

Answer:

x = 5.5

y = 6

Step-by-step explanation:

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For a bivariate random variable (x, y ), if the covariance is 1225, the variance of x is 1600, and the variance of y is 2500. Fi
prisoha [69]

If the covariance is 1225, variance of x is 1600,variance of y is 2500 then the correlation coefficient between x and y is 0.6125.

Given the covariance is 1225, variance of x is 1600,variance of y is 2500.

We have to find the correlation coefficient between x and y.

Covariance is basically a measure of the joint variability of two random variables.

Variance is a basically a measure of dispersion, meaning it is a measure of how far a set of numbers is spread out from their average value.

The correlation coefficient is basically the specific measure that quantifies the strength of the linear relationship between two variables in a correlation analysis.

We know that the formula of correlation coefficient is as under:

r=covariance (x,y)/\sqrt{variance(x)}*\sqrt{variance (y)}

r=1225/\sqrt{1600}*\sqrt{2500}

r=1225/(40*50)

r=1225/2000

r=0.6125

Hence if the covariance is 1225, variance of x is 1600,variance of y is 2500 then the correlation coefficient between x and y is 0.6125.

Learn more about correlation coefficient at brainly.com/question/4219149

#SPJ4

4 0
2 years ago
A barn has 11 heads and 36 legs. How many are chicks and how many are pigs
Helen [10]

answer is 7 pigs and 4 chicks

pigs' legs =     7 x 4 = 28

chicks' legs =  4 x 2 = 8

28 + 8 = 36 legs

7 0
3 years ago
Read 2 more answers
Giving brainlyist to the first person to answer correctly and having a complete answer.
Brums [2.3K]

Answer:

25

Step-by-step explanation:

2400 dived by 96 is 25

5 0
2 years ago
Please Help!!!
Mila [183]

Answer:

Step-by-step explanation:

sum of angles of triangle=180

90+50+B=180

B=180-140

<h2>B=40</h2>

sin50= 0pp/hyp

sin50= 24/c

c=24/sin 50

<h2>c=31.3</h2>

sin B= opp /  hyp

sin 40 = b/c

<h2>b= 20.1</h2>
4 0
3 years ago
I need help with this problem
kolbaska11 [484]
It’s 20 I believe. All together it should be 160 so you add 118 and 22 to get 140. Then subtract that from 160 and you get 20.
7 0
3 years ago
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