please help me please ​

Answer:

Your answer for the first one is B

Step-by-step explanation:

Answer:

Ways to choose a set two balls of the same color:

[0.5 * (b) * (b - 1)] + [0.5* (r) * (r - 1)]

Different colors:

0.5 * [(b) * (r) + (r) * (b)] = 0.5 * (2 * b * r)  

= b * r

Any two balls

0.5 * (b + r) * (b + r - 1)

= 0.5 * [b * (b + r - 1) + r * (b + r - 1)]

= 0.5 * [b^2 + b * r - b  + b * r + r^2 - r]

= 0.5 * [b^2 - b + r^2 - r + b * r + b * r]

= 0.5 * [b * (b - 1) + r * (r - 1) + 2 * b * r]

= 0.5 * (b * (b - 1)) + 0.5 * (r * (r - 1)) + 0.5 * (2 * b * r)

= [0.5 * (b * (b - 1)) + 0.5 * (r * (r - 1))] + [b * r]

= Number of ways of choosing two balls of the same color + number of ways of choosing two balls with different colors

Step-by-step explanation:

Step-by-step explanation:

here they gave 12 km are reached by 2.5 hours so we. should how much time they took for 1km

12/ 2.5 which is also 150min

12km which is also 12000

12000/150= 80m

it took 80m in 1min so

1hr = 60min

1hr x 80m

60x80

4800

convert it intlo km

4800/1000

4.8km

so it took 4.8 km for 1hour

The time to complete the race is 2.5 hours, then the rate will be equal to 4.8 kilometers per hour.

The four basic operations of arithmetic can be used to add, subtract, multiply, or divide two or even more quantities.

They cover topics like the study of integers and the order of operations, which are relevant to all other areas of mathematics including algebra, data processing, and geometry.

As per the given information in the question,

Total distance = 12 kilometers

Total time taken to complete 12 kilometers = 2.5 hours

Then, the rate in kilometers per hour will be,

= 12/2.5

= 4.8 kilometers per hour.

To know more about arithmetic operations:

https://brainly.com/question/13585407

#SPJ5

Answer:

The answer is 5 3/4

Step-by-step explanation:

13/4 = 3 1/4

3 1/4 + 2 2/4 = 5 3/4

Hope this helped you!

Answer:

f(n)=4*2^(n-1)

f(n)=a*b^n -> 2 is the multiplier for the outputs, so b=2. 4 is the output when n=1 (all answers are to the power of n-1), so a=4

Step-by-step explanation:

I think it should be right angle

Answer:

Step-by-step explanation:

2miles

The required shortest between the two houses is given as 10 miles. Option B is correct.

In a right-angled triangle, its side, such as the hypotenuse, is perpendicular, and the base is Pythagorean triplets.

Here,
Matthew lives 6 miles east of the school drew lives 8 miles north of the school.

Let's assume, the position of Mathew and drew house create the right angle with the school,
hypotenuse distance between Mather and Drew's house be x,
Applying the Pythagoras theorem,

x = √[8² + 6²]
x = √[100]
x = 10 miles

Thus, the required shortest between the two houses is given as 10 miles. Option B is correct.

Learn  more about Pythagorean triplets here:

brainly.com/question/22160915

#SPJ2

Answer:

22,29,37

Step-by-step:

1,2,4,7,11,16,22,29,37

+1+2+3+4+5+6+7+8...

Answer:

22,29,37

Step-by-step explanation:

Answer:

x >-2

Step-by-step explanation:

-4(x-1)<12

Divide each side by -4, remembering to flip the inequality

-4/-4(x-1)<12/-4

x-1 > -3

Add 1 to each side

x-1+1 > -3+1

x >-2

open circle at -2  

line extending to the right

Answer:

82% is her highest score

Step-by-step explanation:

82 is greater than 23, 80, 17 and 20

Answer: Since, m∠2 + m∠1 = 180° [Supplementary angles]

  125° + m∠1 = 180°

  m∠1 = 180° - 125°

  m∠1 = 55°

2). Since ∠7 ≅ ∠12 [alternate interior angles]

  m∠7 = m∠12 = 37°

3). m∠3 = m∠18 = 102° [Alternate exterior angles]

4). m∠8 + m∠3 + m∠7 = 180°

   m∠8 + 102 + 37 = 180

   m∠8 = 41°

5). m∠14 = (m∠7 + m∠8) [Alternate angles]

   m∠14 = 37 + 41 = 78°

6). m∠4 = 180° - m∠3 [Linear pairs]

            = 180 - 102

            = 78°

7). m∠9 = m∠3 = 102° [Vertical angles]

8). m∠15 = m∠2 [Alternate exterior angles]

              = 125°

9). m∠5 = m∠15 [Corresponding angles]

            = 125°

10). m∠10 + m∠5 = 180° [Sum of interior angles on one side of the transversal]

    m∠10 = 180 - 125

              = 55°

10). m∠16 = m∠10 = 55° [Vertical angles]

11). m∠6 = m∠10 = 55° [Alternate interior angles]

12). m∠11 = m∠15 = 125°

13). m∠17 = m∠14 = 78° [Vertical angles]

Step-by-step explanation:

Answer:

Step-by-step explanation:

Answer:

7. To perform a t-test when the sample size is small, the sample must show no evidence of strong skewness and must contain no outliers.

Step-by-step explanation:

These are the two conditions required for performing a t test

- Sample Size: A small sample size can reduce the statistical power of a t-test, making it more challenging to detect significant differences between groups. Generally, a larger sample size is desirable to obtain more reliable and representative results.

- Skewness: Skewness refers to the asymmetry of the distribution of data. In a t-test, assuming normality of the data is important for accurate results. If the data exhibits strong skewness, the assumption of normality may be violated. In such cases, alternative non-parametric tests or transformations of the data may be more appropriate.

- Outliers: Outliers are extreme values that significantly differ from the rest of the data. They can have a disproportionate impact on the results of a t-test, particularly when the sample size is small. Outliers can distort the mean and affect the assumptions of normality and homogeneity of variance.

While the presence of skewness or outliers does not prohibit the use of a t-test with a small sample size, it is important to interpret the results with caution and consider alternative approaches if necessary. Robust statistical methods, such as non-parametric tests or bootstrapping, can be useful when dealing with non-normal or outlier-prone data, especially with small sample sizes. Additionally, visual inspection of the data distribution, such as through histograms or box plots, can help identify potential skewness or outliers.

Answer:84.84m^2

Edit: I redid it doing the base separate and got 84.847 because Pythagorean theorem tells you the sides of the three triangles are 6.998 which is ever so slightly smaller than the base triangle.

Step-by-step explanation:

This is assuming the triangles are equal. 1/2bh gives you 21.21 for the triangle with the given height and then multiplying that by four for all the sides gives you 84.84m^2. The question doesn’t specify what type of pyramid it is so again I’m assuming it’s equal. Not 100% positive hope it can help at all.

The statement "If f'(x) has a minimum value at x = c, then the graph of f(x) has a point of inflection at x = c" is false.

A point of inflection occurs on the graph of a function when the concavity changes. It is a point where the second derivative of the function changes sign. However, the existence of a minimum value for the derivative of a function at a particular point does not necessarily imply a change in a concavity at that point.

For example, consider the function f(x) = x³. The derivative f'(x) = 3x² has a minimum value of 0 at x = 0, but the graph of f(x) does not have a point of inflection at x = 0. In fact, the graph of f(x) is concave up for all values of x, indicating that there is no change in concavity and no point of inflection.

Therefore, the presence of a minimum value for the derivative does not guarantee the existence of a point of inflection on the graph of the original function. Hence, the statement is false.

Learn more about point of inflection here:

https://brainly.com/question/30767426

#SPJ11

Answer:

54 hope it helped you out

Answer:

it will take 6 minutes, just keep adding 1.4 to -8.4 until you reach 0

Step-by-step explanation:

Answer: It will take 6 minutes because all you need is to divide 8.4 and 1.4 (don't put the negative sign or ignore it)!

According to the given data Likewise, alpha is also determined based on the type of test, the confidence interval required, and the critical value. Therefore, without this additional information, it is not possible to determine alpha and the type of test.

Population mean = 24

Standard deviation = 2.29

The type of test (one-tailed or two-tailed) cannot be determined from the given information. Further, the alpha level also cannot be determined from the given information. This is some additional information we need to know while conducting hypothesis testing. The hypothesis testing procedure depends upon the nature of the problem, and accordingly, the type of test is decided. If the problem statement is such that the researchers are concerned about the difference between two groups or two measurements, a two-tailed test is done. If the problem statement is such that the researchers are concerned about the difference in a single direction only, that is a one-tailed test.

Likewise, alpha is also determined based on the type of test, the confidence interval required, and the critical value. Therefore, without this additional information, it is not possible to determine alpha and the type of test.

To know more about critical value visit:

https://brainly.com/question/32607910

#SPJ11

Answer:

12

Step-by-step explanation:

solve for y

y = 1.5x + 2

notice this is in form y = mx + b

m is slope, b is y intercept

m = 1.5

slope is 1.5

hope this helps :)

jeron

Answer:

D

Step-by-step explanation:

There are 7 letters in the word 'ALGEBRA'.

So the probability of picking any letter, in the beginning, is 1/7.

So the probability of picking any of the 'A's at the start is 2/7.

However for the second time, there'll only be 6 letters left and 1 A so the probability of getting the second A would be 1/6.

To find the combined probability, multiply these fractions together so:

\(\frac{2}{7}\) times \(\frac{1}{6}\)= \(\frac{2}{42} = \frac{1}{21}\).

So the answer to the question would be D: 1 in 21.

Answer:

D) 1 in 21

Step-by-step explanation:

The first draw:

\(\frac{2 (A's)}{7 (letters)} =2/7\)

The second draw (no replace):

\(\frac{1(A's)}{6(letters)} =1/6\)

The probability:
\(P=(\frac{2}{7})(\frac{1}{6} ) =\frac{(2)(1)}{(7)(6)} =\frac{2}{42}\)

simplified:

\(P=\frac{1}{21}\)

Hope this helps

I hope this helps you...

Answer:

5yds

Step-by-step explanation:

\(a^{2} +b^{2} =c^{2}\)

\(4^{2} +3^{2} =c^{2}\)

16+9=\(c^{2}\)

25 = \(c^{2}\)

\(\sqrt{25\) = c

5= c

5 yds

Answer:

the answer is 135 pounds

Answer:

180 - 25% = 135

Hope this helps

The common difference  of the given arithmetic sequence is 11.  "d" is the common difference.

arithmetic sequence -

The difference between any two successive numbers in this ordered series of numbers is always the same.

AP = a₁ + a₂ + a₃ ...........\(a_{n}\)

AP =  a + ad + a2d...........a(n-1)d

where

a= first term

d = the common difference

\(a_{n}\) = last term

given AP is

-20, -9, 2, 13, 24,35, ......

a₁ = -20

a₂ = -9

a₃ = 2

d = a₂ - a₁

d = -9 - (-20)

d = -9 + 20

d = 11

Similarly,

d = a₃ - a₂

d = 2 - (-9)

d = 2 + 9

d = 11

The common difference  of the given arithmetic sequence is 11.  "d" is the common difference.

To know more about arithmetic sequence

https://brainly.com/question/28106621

#SPJ1

The slope of the line that contains these points is 0.75.

The slope of a line is the change in y-values divided by the change in x-values. In other words, it is the rise over the run. We can use the points given to calculate the slope.

Let's take the first two points (9, -24) and (13, -21) and use the formula for slope:

slope = (y2 - y1) / (x2 - x1)

slope = (-21 - (-24)) / (13 - 9)

slope = (3) / (4)

slope = 0.75

We can do the same with the other two points (17, -18) and (21, -15):

slope = (-15 - (-18)) / (21 - 17)

slope = (3) / (4)

slope = 0.75

Since the slope is the same for both sets of points, we can conclude that the slope of the line that contains these points is 0.75.

The slope of the line that contains these points is 0.75.

Learn more about slope

brainly.com/question/3605446

#SPJ11

The cost per cookie would be $7.50.

What is multiplication?

Multiplication is a mathematical operation used to find the product of two or more numbers. In simple terms, it is the repeated addition of a number a certain number of times. For example, the expression "3 times 4" can be written as 3 x 4, and it means 3 added to itself 4 times, or 3 + 3 + 3 + 3 = 12. The symbol "x" is used to represent multiplication, and the result of multiplying two numbers is called a product.

To determine the cost per cookie, we can use the information given to set up a system of equations. Let x be the cost per cookie. Then the cost of 2 cookies is 2x and the cost of 4 cookies is 4x. The cost of 6 cookies is 6x.

From the first piece of information, we have:

2x = $15

Dividing both sides by 2, we find:

x = $7.50

So the cost per cookie is $7.50. We can check this by plugging it back into the equations for the cost of 4 and 6 cookies to make sure they match the given information:

4x = 4 * $7.50 = $30

6x = 6 * $7.50 = $45

Since these match the given information, we can conclude that the cost per cookie is $7.50.

Hence, the cost per cookie would be $7.50.

To learn more about multiplication, visit:

https://brainly.com/question/10873737

#SPJ1

Answer:

C) 1/2

Step-by-step explanation:

We know that 3/8 cup of brown sugar and 1/3 cup of white sugar are mixed together to make the sugar mixture.

From this sugar mixture, 1/4 cup is set aside for the crumb topping.

To find out how much sugar mixture is used to make the cake, we need to subtract the amount set aside for the crumb topping from the total sugar mixture.

We can start by converting the mixed unit of measurement (brown sugar in cups and white sugar in cups) to a single unit of measurement (cups)

3/8 cup of brown sugar + 1/3 cup of white sugar = (3/8)+(1/3) = 5/12 cup + 4/12 cup = 9/12 cup.

1/4 cup is set aside for the crumb topping.

So, the remaining sugar mixture used to make the cake is 9/12 cup - 1/4 cup = (9/12) - (1/4) = (9-3)/12 = 6/12 cup = 0.5 cup