please help me i need help i will give u brainlist

Answer:

x=60°

Step-by-step explanation:

180 - 90 = 90

90 - 30 = 60

x=60

Answer:

I am not entirely sure so don't kill me if it's wrong qwq

Step-by-step explanation:

Well assuming P represents the number of outcomes, n the number of competitors and r the number of places to be awarded.

P = n!

    (n−r)!

P=30! /

     (30-4)!

P=30!/26!

P=657720

Performing a Chi-Square test is a statistical tool used to determine if there is a significant difference between observed and expected data. The test helps to analyze categorical data by comparing observed frequencies to the expected frequencies. The p-value in a Chi-Square test refers to the probability of obtaining the observed results by chance alone.

If a p-value lower than 0.01 is obtained in a Chi-Square test, it means that the results are statistically significant. In other words, there is strong evidence to reject the null hypothesis, which states that there is no significant difference between the observed and expected data. This means that the observed data is not due to chance alone, but rather to some other factor or factors.

The mean, or average, is not directly related to the Chi-Square test or the p-value. The Chi-Square test is specifically used to determine the significance of the observed data. However, the mean can be used as a measure of central tendency for continuous data, but it is not applicable to categorical data.

In conclusion, obtaining a p-value lower than 0.01 in a Chi-Square test means that there is strong evidence to reject the null hypothesis, and that the observed data is statistically significant.

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The area between the singles and doubles sidelines in tennis is called the tramlines. Tramlines serve specific purposes and affect the rules and strategies of the game.

The tramlines, also known as alleyways or doubles alleys, are located on both sides of the tennis court, running parallel to the singles sidelines. They create additional playing areas for doubles matches, extending the width of the court. These tramlines are marked by lines that are typically one and a half feet wide.

During doubles play, each team member has their own respective tramline. The purpose of the tramlines is to define the legal hitting areas for players. When serving, the server must aim to hit the ball within the singles sideline and the tramline on their side of the court. After the serve, the ball is considered "in" if it lands within the tramlines and between the singles and doubles sidelines.

The presence of the tramlines influences the strategies and tactics used in doubles matches. Players can utilize the additional space to angle shots and create different angles for their opponents to cover. The tramlines also affect positioning and movement on the court, as players need to cover a wider area during rallies.

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Answer:

It is A

Step-by-step explanation:

You have 4 muffins or 4m with a 2 dollar off coupon so therefore it is 4m-2

Answer:

4m-2

Step-by-step explanation:

The cost, m, is subtracted by 2. There are 4 muffins being bought, so the term would be 4m, making the equation 4m-2.

Answer: Its 130 degrees

The algebraic expression that corresponds to the sentence "I think of a number, subtract 4, then divide by three" is given as follows:

(n - 4)/3.

The sentence for this problem is given as follows:

"I think of a number, subtract 4, then divide by three".

The number is unknown, hence the variable used to represent the number is given by n.

Then the subtraction of the number n by 4 is represented by the expression presented as follows:

n - 4.

The division of the entire expression by 3 means that the parenthesis has to be applied to (n - 4), due to the precedence of operators, hence:

(n - 4)/3.

The problem asks for the algebraic expression that represents the sentence.

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It will take 62.91 years for Kevin to make the amount  $2500 to  $7500 .

In the question ,

it is given that ,

the amount that Kevin deposited (P) in bank = $2500

the interest rate (r) = 1.75% ,

the compound interest is quarterly ,

So , n is = 4 .

let the time taken to earn $7500 be = x years ;

Substituting the values in the Amount formula for the Compound Interest ,

Amount = P(1 + r/n)ⁿˣ

7500 = 2500(1 + 0.0175/4\()^{4x}\)

Simplifying further ,

we get ,

3 = (1.004375\()^{4x}\)

After applying log both the sides ,

we get ,

log(3) = 4x*log(1.004375)

x = log(3)/(4*log(1.004375))

Simplifying further ,

we have ,

x = 62.91 years .

Therefore , the time taken is = 62.91 years

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Answer:

actually its 60 and 30

Step-by-step explanation:

Have a nice day

The probability is based on actual observations or data, which makes it an experimental probability. It is important to note that experimental probabilities may not always match theoretical probabilities due to factors such as bias or chance.

The given scenario is an example of experimental probability. Experimental probability refers to the probability of an event based on actual observations or data collected through experimentation or observation. In this case, the experiment involved rolling a die containing the numbers 1-6, and observing the number that appears on the top face of the die. Out of the 15 times the die was rolled, it landed on an even number 8 times. The experimental probability of rolling an even number can be calculated by dividing the number of times an even number was rolled by the total number of rolls, which is 8/15 in this case.

Theoretical probability, on the other hand, refers to the probability of an event based on mathematical calculations and assumptions. For instance, the theoretical probability of rolling an even number on a fair six-sided die can be calculated as 3/6 or 1/2, since there are three even numbers (2, 4, and 6) and six possible outcomes. However, in this case, the probability is based on actual observations or data, which makes it an experimental probability. It is important to note that experimental probabilities may not always match theoretical probabilities due to factors such as bias or chance.

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The five sets of integers that has a mean of -10 will be 10, -15, -2, -12, and -11.

It should be noted that mean simply means average. Therefore, the numbers that will give a mean of -10 will be:

-10, -15, -2, -12, and -11.

Therefore, the mean will be:

= ( - 10 + -15 + -2 + -12 + -11) / 5

= -50 / 5

= -10

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Answer:

Step-by-step explanation:

Answer:

the cost per liter of the paint is equal to 24 8/liter

Hope this helps :)

Answer:

∠ABC= 82°

∠ACB= 82°

∠BAC= 16°

Step-by-step explanation:

∠ABC +∠ACB +∠BAC = 180° (∠ sum of △ABC)

(5x -3)° +(5x -3)° +(x -1)°= 180°

5x -3 +5x -3 +x -1= 180

11x -7= 180 (simplify)

11x= 180 +7 (+7 on both sides)

11x= 187

x= 187 ÷11

x= 17

∠ABC

= (5x -3)°

= [5(17) -3]°

= 82°

∠ACB

= ∠ABC

= 82°

∠BAC

= (17 -1)°

= 16°

Alternatively,

∠BAC

= 180° -82° -82°

= 16°

Step-by-step explanation:

c=8

hope it helps.....,

Answer:

c = 8

Step-by-step explanation:

8 x 8 = 64

The surface area of the square pyramid is 45.

Given data :

H = 6ft.)

W = 3ft

L = 3ft.

2 × b × s +b. Volume of a Square Pyramid

= 45ft

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Answer:

D.

Step-by-step explanation:

By calculation (I used a calculator for this one):

Therefore, the answer is D.

Answer:

  15 feet

Step-by-step explanation:

Given an 8' object casts a 10' shadow, you want to know the length of the shadow of a 12' object.

The shadow length is proportional to the object length:

  shadow/object = 10'/8' = s/12'

Multiplying by 12', we have ...

  s = (12')(10/8) = 15'

The shadow of a tree 12 feet tall will be 15 feet long.

The probability of obtaining exactly as many heads as you just obtained if your coin is the fair coin is 0.2461.

Option C is correct

The probability of obtaining exactly as many heads as you just obtained if your coin is the fair coin is given by the binomial probability formula:

P(X = k) = (n choose k) \(* p^k * (1-p)^(n-k)\)

where X is the random variable representing the number of heads, n is the total number of coin flips, k is the number of heads obtained, and p is the probability of getting a head on any individual flip.

Since we are assuming that the coin is fair, p = 0.5. Let's say you flipped the coin n times and obtained k heads. Then the probability of obtaining exactly k heads with a fair coin is:

P(X = k) = (n choose k \(* 0.5^k * ()1-0.5)^(n-k)\)

We don't know what n or k are, so we can't compute the exact probability. However, we can use the fact that the coin is fair to get an estimate. If we assume that the number of heads obtained is roughly half of the total number of flips, then k = n/2. Plugging this into the formula, we get:

\(P(X = n/2) = (n choose n/2) * 0.5^(n/2) * (1-0.5)^(n/2)\)

Simplifying this expression, we get:

\(P(X = n/2) = (n choose n/2) * 0.5^n\)

Now, we want to find the probability of obtaining exactly as many heads as we just obtained. Let's say we flipped the coin 10 times and obtained 5 heads. Then we want to find P(X = 5), which is:

P(X = 5) = (10 choose 5) \(* 0.5^5 * (1-0.5)^(10-5)\) = 0.2461

Therefore, the probability of obtaining exactly as many heads as you just obtained if your coin is the fair coin is 0.2461.

Option C is correct

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Answer:Answer for the first one is just 7/9, 28/36Second one is 9/14, 3/4For the third one you multiply 12.50 by 5 which gives you 62.5

Step-by-step explanation:

Answer:

A.

Step-by-step explanation:

Given: limit of f(x) exists at x = a

To choose: the correct option

Solution:

A limit is a value that a function approaches as the input approaches some value.

\(\lim_{x\rightarrow a}f(x)=L\) means that as x approaches to value a then f(x) approaches to value L.

A limit of a function f(x) exists at x = a if \(\lim_{x\rightarrow a^-}f(x)=\lim_{x\rightarrow a^+}f(x)=L\)

So, option A. is correct.

Answer:

A.

I took the quiz and got it correct.

Answer: x=32, y=45, z=45

Step-by-step explanation:

Now, x is cut in half on a flat plane which is a supplementary angle (2 angles that add up to 180 degrees) so just subtract 148 from 180 and you get 32.

Since a line cuts y and z equally in half and the line it is connected to is perpendicular (right angle), we can safely say both angles are equal to 45 degrees.

A. A sample size of 62 should be taken for a 95% level of confidence.

B. The sample size of 107 should be taken for a 99% level of confidence.

a. To estimate the sample size needed to estimate the mean time a staff member spends with each patient, we can use the formula for sample size calculation:

n = (Z^2 * σ^2) / E^2

Where:

n = required sample size

Z = Z-score corresponding to the desired level of confidence

σ = population standard deviation

E = desired margin of error

For a 95% level of confidence:

Z = 1.96 (corresponding to a 95% confidence level)

E = 2 minutes

σ = 8 minutes (population standard deviation)

Substituting these values into the formula:

n = (1.96^2 * 8^2) / 2^2

n = (3.8416 * 64) / 4

n = 245.9904 / 4

n ≈ 61.4976

Since we can't have a fraction of a sample, we round up the sample size to the nearest whole number. Therefore, a sample size of 62 should be taken for a 95% level of confidence.

b. For a 99% level of confidence:

Z = 2.58 (corresponding to a 99% confidence level)

E = 2 minutes

σ = 8 minutes (population standard deviation)

Substituting these values into the formula:

n = (2.58^2 * 8^2) / 2^2

n = (6.6564 * 64) / 4

n = 426.0096 / 4

n ≈ 106.5024

Rounding up the sample size to the nearest whole number, a sample size of 107 should be taken for a 99% level of confidence.

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9514 1404 393

Answer:

Step-by-step explanation:

The rate of change in each case can be found by dividing right-column differences by left-column differences.

Table 1

  (56 -54)/(10 -9) = 2/1 = 2 . . . the constant rate of change

__

Table 2

  (3 -0)/(4 -0) = 3/4 . . . the constant rate of change

_____

Additional comment

Often, in math problems of this sort, you fill in a blank with a number. Above, we have computed those numbers. In real life, it is useful to consider the units that go with that number. The units are divided in the same way the numerical values are.

Table 1: 2 in/yr

Table 2: 3/4 °C/h

Answer:

A

Step-by-step explanation:

give me da 20 pointssss

Answer:

What on my screen the pic is blurry?

Step-by-step explanation:

Answer:

B

Step-by-step explanation:

Since it's MCQ and it's LHS is all 7x - 2y, you can simply sub in (5, -2) into each option and see which one has its LHS = RHS.

7(5) - 2(-2) = 35 + 4 = 39

Hence, option B is the answer.

Topic: Coordinate Geometry

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