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3 years ago

HELP PLEASEEEEEEEE!!!!!!!

Mathematics

2 answers:

Andrew [12]3 years ago

7 0

Answer:

Step-by-step explanation:

$We\ know\ that\\ Mean=\frac{Total\ Sum\ of\ observations}{Total\ number\ of\ observations} \\Here,\\Total\ Sum\ of\ the\ given\ observations\ are :\\9+9+2+8+9+8+7+8+3\\=63\\Total\ number\ of\ the\ given\ observations\ are :\\=9$

$Hence,\\Mean=\frac{63}{9}\\=7$

Zielflug [23.3K]3 years ago

7 0

You would do

9+9+2+8+9+8+7+8+3 divided by 9

63/9=7

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There are 3 students to 1 adult on a field trip. You need to find the number of adults needed for 24 students. What would the se

coldgirl [10]

Answer:

a = 24*1/3

a =8

Step-by-step explanation:

We are using proportions to solve this problem by putting students over adults

students 3 24

--------------- = --------------- = -------------

adults 1 a

where a is the unknown number of adults

Using cross products

3a=24*1

Divide by 3

a = 24*1/3

a = 24/3

a = 8

5 0

3 years ago

Amy reached into a bag, recorded the color of the tile she picked, returned the tile and drew again. These are the tiles she has

Vedmedyk [2.9K]

Answer:

(a) P(next ball with blue) = $\frac{3}{10}$ (b) P(Not to be red) = $1-\frac{2}{5} =\frac{3}{5}$

(c) P(drawing 70 times yellow ball) = $\frac{1}{10} \times 70 = 7$ .

Step-by-step explanation:

Given that,

The total outcomes of the color of tile are :-

Red , Red, Blue, Yellow, Blue, Red, Green, Red, Blue, Green.

From the Question,

Total number of outcomes = 10

(a) What is the probability that her next draw will be blue ?

Red = 4,

Blue = 3,

Green = 2,

Yellow = 1.

P(next ball with blue) = $\frac{3}{10}$ .

(b) What is the probability that her next draw will NOT be red?

P(Red ball) = $\frac{4}{10} = \frac{2}{5}$

But we have to find

P(Not to be red) = $1-\frac{2}{5} =\frac{3}{5}$

(c) If Amy draws 70 more times with the same tiles from the question above, what probability would you expect a yellow?

P(Yellow ball) = $\frac{1}{10}$

drawing it 70 times we get the probability

P(drawing 70 times yellow ball) = $\frac{1}{10} \times 70 = 7$ .

5 0

3 years ago

What is this ????><<<<<<<<<<<<<<<

Nat2105 [25]

Answer:

(x, y)

(7, 0)

Bike Trail is at 7, 0... It is 7 spots to the right (on the x axis) and 0 spots up or down (on the y axis)

Step-by-step explanation:

bike trail is the correct answer :)

Hope this helpss

6 0

3 years ago

Read 2 more answers

A neighbor farmer had some chickens. She had 24 feet of wire fencing to

Paraphin [41]

Answer:

A rectangle is defined by its length = L, and its width = W.

So the perimeter of the of the rectangle can be written as:

Perimeter = 2*L + 2*W.

In this case, we want to leave the perimeter fixed, so we have:

24ft = 2*L + 2*W.

Now, we do not have any other restrictions, so to know the different dimensions now we can write this as a function, by isolating one of the variables.

2*L = 24ft - 2*W

L = 12ft - W.

or:

L(W) = 12ft - W.

Such that:

W must be greater than zero (because we can not have negative or zero width).

And W must be smaller than 12ft (because in that case we would have zero or negative length)

Then the possible different dimensions are given by:

L(W) = 12ft - W

0ft < W < 12ft.

8 0

3 years ago

The value of a bike depreciates by 55% per year. Work out the current value of a bike bought 2 years ago for £1300.

nikitadnepr [17]

Year 1: 1,300 * 55% = 715 depreciation
1,300 - 715 = 585 book value

Year 2: 585 * 55% = 321.75 depreciation
585 - 321.75 = 263.25 book value

Year 3: 263.25 * 55% = 144.79 depreciation
263.25 - 144.79 = 118.46 book value

If the bike was bought 2 years ago, then its current value is $263.25.

Currently, it is the beginning of Year 3 but depreciation is computed at the end of the year.

7 0

3 years ago