plz help i have like 1 braincell

Answer: D; undefined

Step-by-step explanation: Slopes are represented by \(y2-y1/x2-x1\) Since both the x-values are the same, they end up creating a 0 in the denominator which leads to an undefined function.

Answer: False, normal distribution describes continuous random variables and not discrete random variables

Step-by-step explanation: To describe discrete random variables other patterns of distributions can be used like binomial distribution. Therefore it is not recommended to use normal distribution for them.

Although in rare cases values of discrete variables can be approximated via normal distribution too but these won't be accurate values hence highly unstable.

The sentence "64% of women in the sample are the principal investor in their household" serves as an example of descriptive statistics.

This sentence provides a summary of the survey's data and a descriptive statistic (percentage) that characterizes the sample's characteristics.

According to the survey's findings, "there is a correlation between American women and being the principal investor in their household." The sample data are used to draw this conclusion about the population. Despite the fact that the sample is not representative of all American women, the findings indicate that a sizable number of the women in the sample are the principal investors in their households.

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The probability of finding a resident without adequate supplies within the first 5 surveys can be represented as \(1 - (1 - p)^4.\)

To find the probability that we must survey at least 5 California residents until we find one who does not have adequate earthquake supplies, we can use the concept of geometric probability.

The probability of finding a California resident who does not have adequate earthquake supplies can be represented as p. Therefore, the probability of finding a resident who does have adequate supplies is 1 - p.

Since we want to find the probability of surveying at least 5 residents until we find one without adequate supplies, we can calculate the probability of not finding such a resident in the first 4 surveys.

This can be represented as \((1 - p)^4\).

Therefore, the probability of finding a resident without adequate supplies within the first 5 surveys can be represented as \(1 - (1 - p)^4.\)

The probability of surveying at least 5 California residents until we find one who does not have adequate earthquake supplies depends on the proportion of residents without supplies. Without this information, we cannot provide a numerical answer.

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Answer:

First of all, what are the options in the drop down menu?

The growth factor of f(x) is 1.1/0.7 = 1.6 times of g(x).

Suppose we have a function f(x).

f(x) ± d = Vertical upshift/downshift by d units (x, y ±d).

f(x ± c) = Horizontal left/right shift by c units (x - + c, y).

(a)f(x) = Vertical stretch for a > 0, vertical shrink a < 0. (x, ay).

f(bx) = Horizonatal compression b > 0, horizontal stretch for b < 0. (bx , y).

f(-x) = Reflection over y axis, (-x, y).

-f(x) = Reflection over x-axis, (x, -y).

f(x) and g(x) are both exponentially growing functions.

For f(x), when x = 0, f(x) = 2 and when x = 1, f(x) = 3.

let f(x) = \(e^{kx}\).

3 = \(e^k\).

k = ln(3).

k = 1.1

For g(x), x = 0, g(x) = 1, x = 1, g(x) = 2.

Now g(x) = \(e^{kx}\).

2 = \(e^k\).

k = ln(2).

k = 0.7.

So, the growth factor of f(x) is 1.1/0.7 = 1.6 times of g(x).

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Answer:

£40 : £24

Step-by-step explanation:

sum the parts of the ratio, 5 + 3 = 8 parts

Divide the amount by 8 to find the value of one part of the ratio

£64 ÷ 8 = £8 , then

5 parts = 5 × £8 = £40

3 parts = 3 × £8 = £24

£64 in the ratio 5 : 3 is £40 : £24

Answer:

24:40

Step-by-step explanation:

Let the ratio be 3x and 5x

3x+5x=64

8x=64

X=8

ratio=3(8):5(8)

24:40

Answer: The family's weekly income is $1500

-------------------------------------------

Work Shown:

x = weekly income (in dollars)

16% of x = amount spent on food per week

16% of x = 240

(16/100)*x = 240

0.16*x = 240

0.16*x/0.16 = 240/0.16

x = 1500

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Answer:

1500

Step-by-step explanation:

16% of x = amount spent on food per week

16% of x = 240

(16/100)*x = 240

0.16*x = 240

0.16*x/0.16 = 240/0.16

x = 1500

Hope this helps :)

Answer

n= 5cm times x

5cm times 50=250

Step-by-step explanation:

Answer:

Step-by-step explanation:

Hi there! :)

Answer:

\(\huge\boxed{x = 4.5}\)

m∠BGC = 16x - 4

m∠CGD = 2x + 13

m∠BGC + m∠CGD sums up to 90°, therefore:

(16x - 4) + (2x + 13) = 90

Combine like terms and simplify:

16x + 2x - 4 + 13 = 90

18x - 4 + 13 = 90

18x + 9 = 90

18x = 81

18x/18 = 81/8

x = 4.5

Answer:

$14.7

Step-by-step explanation:

Zeke owns stock in a high tech firm

Each share is valued at $21

It's is 30% less than the amount it was purchased

Therefore Zeke pay per share can be calculated as follows

= 21× 30/100

= 21×0.3

= 6.3

= 21-6.3

= 14.7

Hence Zeke's pay per share is $14.7

The required value of w in the given expression is 1, as per the given conditions.

The equation model is defined as the model of the given situation in the form of an equation using variables and constants.

Here,
The question seems to be incomplete, assume that the given expression 8w + 5 = 13
So

8w + 5 = 13
simplify

8w = 13 - 5
w = 8 / 8
w = 1

Thus, the required value of w in the given expression is 1, as per the given conditions.

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Answer:

1st:  81.8

2nd:  82

3rd:  Language arts class

Step-by-step explanation:

1st:  We're told that f(x) = 0.4x + 81 represents the avg. test score in your language arts class, where x is the number of the test taken.  We know then that f(x) is the average test score.  Thus, to find the average test score for test 2, we plug in 2 for x into the function:

f(2) = 0.4(2) + 81

f(2) = 0.8 + 81

f(2) = 81.8

2nd:  Although we're not given the formula for g(x), we know that it is linear and have enough information to find the formula.

The general form for a linear formula is y = mx + b, where m is the slope (change in y / change in x) and b is the y-intercept (point for y when x = 0)

We can find the slope using the slope formula, which is:

\(m=\frac{y_{2}-y_{1} }{x_{2}-x_{1} }\)

We can use any two consecutive points to find the slope:

*Note that y is synonymous with g(x)

Thus, if we allow (1, 84) to represent x1 and y1 and (2, 82) to represent x2 and y2, our slope is:

\(m=\frac{82-84}{2-1}\\ m=-2\)

Now, we can choose any point like (1, 84) and plug in the point and the slope we've found to find b or our y-intercept:

\(84=-2(1)+b\\84=-2+b\\86=b\)

Thus, the formula for g(x) is g(x) = -2x + 86.

Like we did for f(x), we can simply plug in 2 for x to find the average test score for test 2 in your social studies class:

g(2) = -2(2) + 86

g(2) = -4 + 86

g(2) = 82

Third: To find which class had a higher average after completing test 4, we plug in 4 into each function:

f(4) = 0.4(4) + 81

f(4) = 1.6 + 81

f(4) = 82.6

g(4) = -2(4) + 86

g(4) = -8 + 86

g(4) = 78

Therefore, the language arts class had a higher average score for test 4 than the social studies class.

Answer:

a) 45° cause tan = sin/cos and sin 45 and cos 45 both give square root 2/2

b) 120°

c) sin = -1/2 = -30° or 330° both are same

Use the trig circle which i have included in the answer to better understand trig angles

hope that answers your question

I want to let you know that each angle has sets of coordinates the left number is cos and right is sin. Ex) sin of 30 is 1/2 and cos of 30 is square root 3/2 In case you dont fully understand dont hesitate to comment.

good luck!!

In the first question, the statement "Using logarithmic differentiation we obtain that the derivative of the function y = x² satisfies the equation y = 4x log x + 2x" is true.

In the first question, using logarithmic differentiation on the function y = x², we differentiate both sides, apply the product rule and logarithmic differentiation, and simplify to obtain the equation y = 4x log x + 2x, which is correct.

In the second question, the statement is false. When using logarithmic differentiation on the function y = (1+x²)²(1 + sin x)²/(1-x²), the derivative is calculated correctly, but the equation given is incorrect. The correct equation after logarithmic differentiation should be y' = (4x/(1 + x²)(1 + sin x))(1-x²) - (2x(1+x²)²(1 + sin x)²)/(1-x²)².

In the third question, the product z²w is calculated correctly as 30-10%.

It is important to accurately apply logarithmic differentiation and perform the necessary calculations to determine the derivatives and products correctly.

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The 97% confidence interval for the proportion of yellow M&Ms in that bag is [0.118, 0.285]. (option c).

Now, let's apply this formula to our scenario. We are given the counts of each color of M&Ms in the sample, so we can compute the sample proportion of yellow M&Ms as:

Sample proportion = number of yellow M&Ms / sample size

= 22 / (22 + 21 + 13 + 17 + 22 + 14)

= 0.229

Next, we need to find the critical value from the standard normal distribution for a 97% confidence level. This can be done using a z-table or a calculator, and we get:

z* = 2.17

Finally, we need to compute the standard error using the formula mentioned earlier. Since we are interested in the proportion of yellow M&Ms, we can set p = 0.20 (the claimed proportion by Mars Inc.) and q = 0.80 (1 - p), and n = 109 (the sample size). Thus,

Standard error = √[(p * q) / n]

= √[(0.20 * 0.80) / 109]

= 0.040

Plugging in the values in the formula for the confidence interval, we get:

Confidence interval = 0.229 ± 2.17 * 0.040

= [0.118, 0.285]

Hence the correct option is (c).

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Complete Question:

Mars Inc. claims that they produce M&Ms with the following distributions:

| Brown = 30% || Orange = 10% | Red = 20%  |Green = 10% |Yellow = 20% | Blue = 10%

A bag of M&Ms was randomly selected from the grocery store shelf, and the color counts were:

Brown = 22 | Red = 21| Orange = 13 | Green = 17| Yellow = 22 | Blue = 14

Find the 97% confidence interval for the proportion of yellow M&Ms in that bag.

a) [0.018, 0.235]

b) [0.038, 0.285]

c)  [0.118,0.285]

d) [0.168, 0.173]

e) [0.118,0.085]

f) None of the above

the minimum number of subjects needed for a research study regarding the proportion of respondents who reported a history of diabetes using the following criteria is 384.12, which can be rounded up to 385.

The minimum number of subjects needed for a research study regarding the proportion of respondents who reported a history of diabetes using the following criteria is as follows:

95% confidence, within 5 percentage points, and a previous estimate of 0.25.

The formula to calculate the sample size required for the study to determine the proportion is given by:

`n = Z²pq / E²`

Where n = sample size

Z = z-value (1.96 at 95% confidence interval)

E = margin of error

p = estimated proportion of the population

q = 1 - pp

q = estimated proportion of population without the condition (1 - 0.25 = 0.75)

Given,

Z = 1.96E = 0.05p = 0.25q = 0.75

Substituting these values in the above formula, we get;

`n = (1.96)²(0.25)(0.75) / (0.05)²``n = 384.16`

Therefore, the minimum number of subjects needed for a research study regarding the proportion of respondents who reported a history of diabetes using the following criteria is 384.12, which can be rounded up to 385.

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Answer:

C. (4 , 3)

Step-by-step explanation:

We are given a system of equations and are asked to find its coordinate value.

To solve, we can keep in mind that both start with y, therefore meaning that we can replace one of the y's with one of the equations.:

\(y=\frac{1}{4}x+2\\y=x-1\)

\(\frac{1}{4}x+2 = x-1\)

Let's try to get x alone, first subtract 2 from both sides:

\(\frac{1}{4}x=x-3\)

Now subtract x from both sides:

\(-\frac{3}{4}x=-3\)

Now since the denominator is 4, multiply both sides by 4:

\(-3x=-12\)

Lastly, divide both sides by -3 to get x :

\(x=4\)

Now that we know x is 4, we can substitute 4 for x in both equations:

\(y=\frac{1}4(4)+2\\y=(4)-1\)

\(y= 3\\y= 3\)

Y is equal to 3, therfore, our coordinate value is C. (4,3)

Answer:

BOA-30(Given)

BCA-15(See explanation)

BDA- 15(NOT SURE)

Step-by-step explanation:

*Angle at the center is twice the angle at the circumference.

If angle at the center(30) is twice BCA, then BCA is 15.

*I think BDA deals with alternate angles, so might be 15.

I think that is proportional

First to answer

Answer:

The answer is proportional! The pricing is consistent!

5/2 = 2.5

2.5* 3 = 7.5

Answer: (7,10)

Step-by-step explanation:

Answer:

F'(-3,2)

G'(-1,0)

H'(-2,5)

After one rotation of the carousel, Mei has traveled 2π more meters than Anju.

Therefore, the correct answer is option B. 2π more meters.

To determine how many more meters Mei has traveled than Anju after one rotation of the carousel, we need to

calculate the difference in the distances traveled by their horses.

Step 1: Calculate the circumference of the circular path of each horse.

Circumference = 2 × π × radius

For Mei's horse:

Circumference = 2 × π × 3 meters

                        = 6π meters

For Anju's horse:

Circumference = 2 × π × 2 meters

                        = 4π meters

Step 2: Subtract the distances traveled by both horses.

Difference = Mei's distance - Anju's distance

Difference = 6π meters - 4π meters

                 = 2π meters

After one rotation of the carousel, Mei has traveled 2π more meters than Anju.

Therefore, the correct answer is option

B. 2π more meters.

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Answer:

Step-by-step explanation:

Interpreting as: -31+(-45)

Input:

-31 - 45

Result:

-76

Number line:

Number line

Number name:

negative seventy-six

Manipulatives illustration:

- | | - | | = | - |  

| 31 | | 45 | | | 76

Answer:

Two polygons are similar with factor k.

=> The ratio between the area of two polygons: r = k^2

=> Here, the area of polygon B is larger than polygon A: 5^2 = 25 times

Hope this helps!

:)

Answer:

Area of polygon B is larger than the area of Polygon A by 25 times.

Step-by-step explanation:

The simplest way of finding this would be to draw a rough image of polygon A and B.

Let's say you drew Polygon A and B as rectangles. Since the scale factor is 5, the dimensions of the sides of polygon B would be 5 times as that of the dimensions of polygon A.

if you label the dimensions of Polygon A as length 2cm and width as 1cm, its area would be 2 square centimetres.

now keeping the scale factor of 5 in mind, multiply the length and the width by 5. you will get the length of polygon B as 10cm and width as 5cm. the area of polygon B becomes 50 square centimetres.

once you have done this, you will realise that the area of polygon B is 25 times the area of polygon A.

Hope this helped:)

Answer:

Step-by-step explanation:

To evaluate such, the following must be comprehended:

Slope: Rise/Run.

X-intercept: The peculiar point in which the observed linear data intersects the x-axis.

Y-intercept: The peculiar point in which the observed linear data intersects the y-axis.

To evaluate for the slope, which is defined as the agglomerate distance between two points contained within linear data, the following equation must be utilized:

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

Points utilized or given: (-1, 2) and (7, 2).

2 - 2 / 7 + 1 = 0/8 ==> 0

Henceforth, the slope for the particular configuration, as provided, is understood as zero (0).

Utilizing the integral of one of the points provided, as well as slope evaluated for, the following equation could be exploited:

Point-Slope Formula:

Y- y1 = m(x - x1)

Y - 2 = 0(x - 7)

Y - 2 = 0

Y = 2

Hence, the answer to the peculiar interrogate is disclosed as 2, which is identified as where the horizontal line intersects the y-axis at (0, 2).

*I hope this helps.

A system of linear equation in two variables can be solved for at least two equations. The system of equations that could be used to determine the number of pounds of apples sold and the number of pounds of raspberries sold are x + y = 180 and 1.75x + 1.25y = 124.50.

A system of linear equation can be defined as a number of equations needed to solve the equations. For n number of variables n number of equations are required.

Given,

Rate of Apple is $1.75/pound.

Rate of raspberries is $1.25/pound.

Suppose the amount of apple be x pound.

And, the amount of raspberries be y pound.

As per the question total amount of apple and raspberries is 180 pound,

And, the total earning is $124.50.

Then, the system of equations can be written as,

x + y = 180

1.75x + 1.25y = 124.50.

Hence, two equations can be derived for the given situations which are x + y = 180 and 1.75x + 1.25y = 124.50.

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Answer:  x + y = 180

1.75x + 1.25y = 124.50.

Hence, two equations can be derived for the given situations which are x + y = 180 and 1.75x + 1.25y = 124.50.

Step-by-step explanation:

The value of the equation x² - x + 3 is 37/9.

We have,

We can start by multiplying both sides of the equation by x:

2x - 3/x = x + 1

2x - 3 = x^2 + x

Rearranging and simplifying, we get:

x^2 - x + 3 = (2x - 3) + x^2

x^2 - x + 3 = x^2 + 2x - 3

-x + 3 = 2x - 3

5 = 3x

x = 5/3

Now we can substitute x into the equation x^2 - x + 3:

x^2 - x + 3 = (5/3)^2 - 5/3 + 3

x^2 - x + 3 = 25/9 - 15/9 + 27/9

x^2 - x + 3 = 37/9

Therefore,

The value of x² - x + 3 is 37/9.

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