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3 years ago

I need help please anyone help

Mathematics

2 answers:

AleksAgata [21]3 years ago

7 0

Answer:

m<ECF = 32

Step-by-step explanation:

The big triangle is being sectioned congruently from the inside and it's sides. So if one point like AE is equal to EC that means the smaller triangles will be congreunt in side lengths and angles. So if AED is 32 it will be congreunt to ECF making it 32degress

Hoochie [10]3 years ago

5 0

less than 90

Step-by-step explanation:

use a protactor to measure

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A rocking horse has a weight limit of 60 pounds.

Naddika [18.5K]

33 divided by 60= 0.55
0.55 x 100= 55

The answer is 55%

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3 years ago

Help help help help help help

emmainna [20.7K]

Answer: 6

Step-byStep:

[(18- 8) x 3) + (4+3) x 6] divided by 12

step 1- start with the stuff in the parentheses

[(10 x 3) + (7 x 6)] divided by 12

step 2- simplify things in parentheses

[30 + 42] divided by 12

step 3- simplify even more

[72] divided by 12

step 4- remove brackets, and simply even further

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6 0

3 years ago

Read 2 more answers

What’s the answer to this question?

lutik1710 [3]

Answer: B

Step-by-step explanation:

(f+g)(x) means f(x)+g(x). It is saying to add f(x) and g(x). Since we were given f(x) and g(x), we can directly add them together.

(f+g)(x)=4x+2+x²-6 [combine like terms]

(f+g)(x)=x²+4x-4

Now that we have found (f+g)(x)=x²+4x-4, the answer is B.

6 0

3 years ago

Which statement is not true for the function notation of the volume of a cube, V(s) = s3?

Volgvan

<h3>Answer:</h3>

b. The side length of a cube is dependent on the volume.

<h3>Step-by-step explanation:</h3>

The function definition V(s) means the volume (V) is dependent upon the side length (s), <em>not the other way around</em>.

4 0

3 years ago

There are two games involving flipping a coin. In the first game you win a prize if you can throw between 45% and 55% heads. In

Nina [5.8K]

Answer:

d) 300 times for the first game and 30 times for the second

Step-by-step explanation:

We start by noting that the coin is fair and the flip of a coin has a probability of 0.5 of getting heads.

As the coin is flipped more than one time and calculated the proportion, we have to use the <em>sampling distribution of the sampling proportions</em>.

The mean and standard deviation of this sampling distribution is:

$\mu_p=p\\\\ \sigma_p=\sqrt{\dfrac{p(1-p)}{N}}$

We will perform an analyisis for the first game, where we win the game if the proportion is between 45% and 55%.

The probability of getting a proportion within this interval can be calculated as:

$P(0.45$

referring the z values to the z-score of the standard normal distirbution.

We can calculate this values of z as:

$z_H=\dfrac{p_H-\mu_p}{\sigma_p}=\dfrac{(p_H-p)}{\sqrt{\dfrac{p(1-p)}{N}}}=\sqrt{\dfrac{N}{p(1-p)}}*(p_H-p)>0\\\\\\z_L=\dfrac{p_L-\mu_p}{\sigma_p}=\dfrac{p_L-p}{\sqrt{\dfrac{p(1-p)}{N}}}=\sqrt{\dfrac{N}{p(1-p)}}*(p_L-p)$

If we take into account the z values, we notice that the interval increases with the number of trials, and so does the probability of getting a value within this interval.

With this information, our chances of winning increase with the number of trials. We prefer for this game the option of 300 games.

For the second game, we win if we get a proportion over 80%.

The probability of winning is:

$P(p>0.8)=P(z>z^*)$

The z value is calculated as before:

$z^*=\dfrac{p^*-\mu_p}{\sigma_p}=\dfrac{p^*-p}{\sqrt{\dfrac{p(1-p)}{N}}}=\sqrt{\dfrac{N}{p(1-p)}}*(p^*-p)>0$

As (p*-p)=0.8-0.5=0.3>0, the value z* increase with the number of trials (N).

If our chances of winnings depend on P(z>z*), they become lower as z* increases.

Then, we can conclude that our chances of winning decrease with the increase of the number of trials.

We prefer the option of 30 trials for this game.

8 0

3 years ago