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enot [183]
2 years ago
15

Plz help will give Brainliest

Mathematics
2 answers:
belka [17]2 years ago
6 0

Answer:

first we have to collect the like terms:-

3ac-ac-7ab-2ab+5ba+3ba+4a-a

2ac-8ab+8ba+3a

2ac-8ab+8ab+3a

2ac+3a

Step-by-step explanation:

hope this helps you!!!

MARK AS BRAINLIEST PLEASE

NNADVOKAT [17]2 years ago
4 0

= 2ac \:  + ab \:  + 3a \:  - 2bc

<em>see </em><em>the</em><em> </em><em>attachment</em><em>!</em><em>!</em>

<em>hope </em><em>it</em><em> helps</em>

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Suppose that you are interested in determining the average height of a person in a large city. You begin by collecting the heigh
monitta

The standard error of the estimate of average height in the city is 0.25.

Given average height 64 inches, sample mean and sample standard deviation of 4 inches.

We have to determine the standard error of the estimate of the average height in the city.

Standard error is the error which is predicted before research to happen in research. It is calculated by dividing the standard deviation of the sample by the square root of the sample size.

n=256

μ=mean

s = sample standard deviation

Standard error=s/\sqrt{n}

=4/\sqrt{256}

=4/16

=0.25

Hence the standard error of the estimate of the average height is 0.25.

Learn more about standard error at brainly.com/question/1191244

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5 0
2 years ago
A line passes through the points (-1,-1) and (5,8) which points lie on the same line?
djverab [1.8K]

Answer: all points (x,y) that satisfy y=\frac{3}{2}x+\frac{1}{2}

Step-by-step explanation:

The slope of the line is

\frac{-1-8}{-1-5}=\frac{-9}{-6}=\frac{3}{2}

So, substituting into point-slope form, the equation is

y+1=\frac{3}{2}(x+1)\\\\y+1=\frac{3}{2}x+\frac{3}{2}\\\\y=\frac{3}{2}x+\frac{1}{2}

Therefore, all points (x,y) that satisfy y=\frac{3}{2}x+\frac{1}{2} will lie on the same line.

7 0
2 years ago
The surface area of a sphere is 576pi square units. Which choice represents the volume of the sphere?
Leona [35]

Answer:

\large\boxed{V=2304\pi}

Step-by-step explanation:

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S.A.=4\pi R^2

R - radius

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S.A.=576\pi

Substitute and solve for R:

4\pi R^2=576\pi         <em>divide both sides by π</em>

4R^2=576          <em>divide both sides by 4</em>

R^2=144\to R=\sqrt{144}\\\\R=12

The formula of a volume of a sphere:

V+\dfrac{4}{3}\pi R^3

Substitute:

V=\dfrac{4}{3}\pi(12^3)=\dfrac{4}{3}\pi(1728)=(4)\pi(576)=2304\pi

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3 years ago
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x=15

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