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3 years ago

Okay have reposted it.

Mathematics

2 answers:

Delvig [45]3 years ago

6 0

Answer:

Step-by-step explanation:

vredina [299]3 years ago

5 0

Angle 14 is vertical :)

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The length of the west wall of fencing is 2x + 1 and the length of the North wall fencing is 2(2 x -1) write the full expression

marishachu [46]

Answer:

2x+1^2(2x-1)

Step-by-step explanation:

Brainliest if this helps

7 0

3 years ago

Keyan is trying to determine the volume of his wooden tissue box. He is able to completely fill the base of his tissue box with

GrogVix [38]

Answer:

27 unit cubes.

Step-by-step explanation:

Nine unit cubes multiplied by three layers.

9x3=27

8 0

4 years ago

Read 2 more answers

What is meant by the 95% confidence interval of the mean?

Allisa [31]

Answer:

Option c.

Step-by-step explanation:

Confidence interval refers to an interval such that there is a probability that the value of a parameter lies within that interval.

Therefore, $95\%$ the confidence interval of the mean means that there is a probability that the value of a parameter lies within that confidence interval.

So, option c. is correct

7 0

3 years ago

How? (2x^2 - 3x - 4)(x + 7)<br>

lidiya [134]

Answer:

$2 {x}^{3} + 11{x}^{2} - 25x - 28$

Step-by-step explanation:

Using foil method, Multiply the first term

$2 {x}^{2} \times x = 2 {x}^{3}$

Next, Multiply the Outer term in each parenthesis. (2x^2 and 7

$2 {x}^{2} \times 7 = 14 {x}^{2}$

$2 {x}^{2} \times 7 = 14 {x}^{2} \: \: \: 3x \times - x = - 3x$

Then, Multiply the Inner Terms (-3x,-4,7) in each parenthesis

$- 3x \times 7 = - 21x$

$- 4 \times x = - 4x$

Then multiply the last term (-4 and 7).

$- 4 \times 7 = - 28$

Combine it you have

$2 {x}^{3} + 14 {x}^{2} - 3 {x}^{2} - 21x - 4x - 28$

which simplify to

$2 {x}^{3} + 11 {x}^{2} - 25x - 28$

3 0

3 years ago

To be legal for certain types of prize competitions, bowling balls must be very close to 16 lb. The weights of bowling balls fro

PtichkaEL [24]

Answer:

The probability that a manufactured ball will be rejected is 0.99, to two decimal places.

Step-by-step explanation:

The mean weight is 16 Ibs. The standard deviation of the weights of all manufactured balls from the mean weight is 25. The distribution is normal. With a standard deviation this large, it is already obvious that there is a high probability of producing or having rejected balls. The weights of the balls produced here ranges from (16-25)Ibs to (16+25)Ibs.

That's -9Ibs to 41Ibs.

The minimum permissible weight is 15.68. Any ball with a lesser weight gets kicked out!

So the distance or difference between this figure and the mean is (16-15.68) = 0.32

So the probability of obtaining less than 15.68Ibs or the probability of having balls between the lower boundary of -9Ibs and 15.68 is:

25-0.32 = 24.68

24.68 ÷ 25 = 0.9872 ~ 0.99 to two decimal places.

3 0

3 years ago