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3 years ago

What is the value of x?

Mathematics

1 answer:

shepuryov [24]3 years ago

4 0

Answer:

x = 3

Step-by-step explanation:

Set up as proportion and cross multiply to solve:

3/4 = 2.25/x

x = 3

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Bài4 mình không biết làm mọi người help mee

aivan3 [116]

Sorry I can’t read that hand writing if I could just write it on brainly

8 0

3 years ago

PLEASE HELP!!!!!!!<br> Find the Volume of the sphere rounded to the nearest hundredth

Volgvan

Answer:

14130 yd^3

Step-by-step explanation:

The volume of a sphere is

V = 4/3 pi r^3

The diameter is 30 so the radius is d/2 = 30/2 = 15

V = 4/3 pi (15)^3

V = 4500 pi

Letting pi = 3.14

V = 14130 yd^3

5 0

3 years ago

Read 2 more answers

The pie chart shows information about voters in a election.2800 more women vote than men.

Lyrx [107]

ANSWER

The total number of voters is
$10080$

EXPLANATION

Let the
$x$
be the number of voters that are men.

Then the women will be
$x + 2800$

The total voters will be
$x + (x + 2800)$

$2x + 2800$

We now use ratio.

We can see from the diagram that,
$130 \degree$
corresponds to men.

We can write the ratio

$x:130 \degree$

Also the total number of voters corresponds to the angle in a complete circle. This will also give us the ratio,

$(2x + 2800):360 \degree$

We can therefore write the equation,

$\frac{2x + 2800}{x} = \frac{360 \degree}{130 \degree}$

$\frac{2x + 2800}{x} = \frac{36 }{13}$

We cross multiply to get,

$13(2x + 2800) = 36x$

This implies that,

$26x + 36400 = 36x$

We group like terms to obtain,

$26x - 36x = - 36400$

This implies that,

$- 10x = - 36400$

$x = 3640$

The total number of voters
$= 2(3640) + 2800$
$= 10080$

The total number of voters is
$10080$

8 0

3 years ago

A simple random sample of 144 observations was taken from a large population. The sample mean and the standard deviation were de

Vera_Pavlovna [14]

Answer:

The standard error of mean = 10

Step-by-step explanation:

Given a simple sample of 144 observations was taken from a large population.

The size of large sample 'n' = 144

Given sample mean and the standard deviation were determined to be 1234 and 120 respectively.

Given standard deviation of sample (S) = 120

The standard error of mean is determined by

$SE (X^{-} ) = \frac{S.D}{\sqrt{n} }$

$SE (X^{-} ) = \frac{120}{\sqrt{144} } = 10$

<u>Final answer</u>:-

The standard error of mean = 10

4 0

3 years ago

Hiii please help thanks

lys-0071 [83]

Answer:

AED and BEC

Step-by-step explanation:

Supplementary angles are angles that add up to 180 degrees.

AEB + AED = 180.

AEB + BEC = 180.

Hope this helps!

8 0

3 years ago

Read 2 more answers