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Reil [10]
3 years ago
7

Please explain this in steps please friends​

Mathematics
1 answer:
erastova [34]3 years ago
5 0

Answer:

See below

Step-by-step explanation:

The LHS and RHS are exactly the same, so the equality is true.

The associate property of addition says that

\boxed{a+(b+c)=(a+b)+c}

In order to make the addition of fractions, the denominators should be same. So we can write three fractions as one.

\dfrac{1}{2} +\left(\dfrac{2}{3}+\dfrac{3}{4} \right )

\dfrac{1}{2} +\dfrac{2}{3}+\dfrac{3}{4}

\dfrac{1\cdot 6 }{2\cdot 6} +\dfrac{2 \cdot 4}{3 \cdot 4}+\dfrac{3 \cdot 3 }{4 \cdot 3}

\dfrac{ 6 }{12} +\dfrac{8}{12}+\dfrac{9 }{12}

\dfrac{ 23 }{12}

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Consider a population list x, with a CV= 10%. A second population list, y, has a CV= 20%. The linear regression of y on x is y =
ch4aika [34]

Answer:

The correlation coefficient 0.5 depicts that there is moderate positive correlation between y and x.

Step-by-step explanation:

The linear regression equation is

y= a+bx

The given linear equation is

y= 10x

Here, slope=b=10 and intercept=a=0.

From above equation,

ybar=10xbar

We are given that CVx=0.1 and CVy=0.2

where CV=(standard deviation/mean)*100

We know that

b=r(Sy/Sx)

Multiplying by xbar/ybar on both sides

(xbar/ybar)b=r(Sy/Sx)(xbar/ybar)

(xbar/ybar)b=r[(Sy/ybar)/(Sx/xbar))]

(xbar/ybar)b=r[CVy/CVx]

As CVy/CVx=(Sy/ybar)*100/(Sx/xbar)*100=(Sy/ybar)/(Sx/xbar).

By putting ybar=10xbar, b=10, CVx=0.1 and CVy=0.2.

(xbar/10xbar)10=r(0.2/0.1)

1=r(0.2/0.1)

1=r(2)

r=0.5

There is moderate positive correlation between y and x.

6 0
3 years ago
Solve for the indicated variable in this literal equation: <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7Ba%7D%7Bb%7D%3Dc%20%20"
Rainbow [258]

a/b=c

you gonna cross multiple.

so, b multiple by c=a

bc=a

then you divide it by c

so the answer will be b=a/c


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What is m⦟3?
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WILL GIVE A BRAINLEST-GEOMETRY
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Answer:

A

Step-by-step explanation:

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