Need help old help I will give you 10 points

Need Help Old Help I Will Give You 10 Points

Answers

Answer 1

Answer:

B

Step-by-step explanation:

because d needs to be less than or equal to 99 for the equation to be less than or equal to 4.


Related Questions

complete the square f(x)=x^2-12x-4

Answers

Answer:

Solve for x over the real numbers:

x^2 - 12 x - 4 = 0

Add 4 to both sides:

x^2 - 12 x = 4

Add 36 to both sides:

x^2 - 12 x + 36 = 40

Write the left hand side as a square:

(x - 6)^2 = 40

Take the square root of both sides:

x - 6 = 2 sqrt(10) or x - 6 = -2 sqrt(10)

Add 6 to both sides:

x = 6 + 2 sqrt(10) or x - 6 = -2 sqrt(10)

Add 6 to both sides:

Answer: |

| x = 6 + 2 sqrt(10) or x = 6 - 2 sqrt(10)

Let's say someone is conducting research on whether people in the community would attend a pride parade. Even though the population in the community is 95% straight and 5% lesbian, gay, or some other queer identity, the researchers decide it would be best to have a sample that includes 50% straight and 50% LGBTQ+ respondents. This would be what type of sampling?
A. Disproportionate stratified sampling
B. Availability sampling
C. Snowball sampling
D. Simple random sampling

Answers

The type of sampling described, where the researchers intentionally select a sample with 50% straight and 50% LGBTQ+ respondents, is known as "disproportionate stratified sampling."

A. Disproportionate stratified sampling involves dividing the population into different groups (strata) based on certain characteristics and then intentionally selecting a different proportion of individuals from each group. In this case, the researchers are dividing the population based on sexual orientation (straight and LGBTQ+) and selecting an equal proportion from each group.

B. Availability sampling (also known as convenience sampling) refers to selecting individuals who are readily available or convenient for the researcher. This type of sampling does not guarantee representative or unbiased results and may introduce bias into the study.

C. Snowball sampling involves starting with a small number of participants who meet certain criteria and then asking them to refer other potential participants who also meet the criteria. This sampling method is often used when the target population is difficult to reach or identify, such as in hidden or marginalized communities.

D. Simple random sampling involves randomly selecting individuals from the population without any specific stratification or deliberate imbalance. Each individual in the population has an equal chance of being selected.

Given the description provided, the sampling method of intentionally selecting 50% straight and 50% LGBTQ+ respondents represents disproportionate stratified sampling.

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hey pls answer
WHAT IS THE PRODUCT OF 2 AND 3

i'm having trouble with this, pls help!

Answers

Answer:

6

Step-by-step explanation:

2(3)=6

Answer:6

Step-by-step explanation:

2x3 is 6

A grocery store wants to examine the relationship between the sales amounts each day at two different locations, store A and store B. The sales amount each day, in dollars, was recorded for 10 days at each store. The least-squares regression line is yˆ=−3,000+1.2x, where x represents the sales amounts each day at store A and y represents the sales amounts each day at store B. If the mean of the 10 sales amounts for store B is $45,000, what is the mean of the 10 sales amounts for store A?

Answers

Answer:

The mean of the 10 sales amounts for store A is $40,000.

Step-by-step explanation:

Given;

yˆ= −3,000 + 1.2x ...................... (1)

Where;

x = sales amounts each day at store A or the mean of the 10 sales amounts for store A = ?

yˆ = sales amounts each day at store B or the mean of the 10 sales amounts for store B = $45,000

Substituting y = 45,000 into equation (1) and solve for x, we have:

45,000 = −3,000 + 1.2x

45,000 + 3,000 = 1.2x

48,000 = 1.2x

x = 48,000 / 1.2

x = 40,000

Therefore, the mean of the 10 sales amounts for store A is $40,000.

Rational zeros of polynomial function
Help!

Rational zeros of polynomial function Help!

Answers

Zeros of the given polynomial are -2, 2, -3/2, 3/2

What are zeroes of a polynomial?

Zeros of a polynomial can be defined as the points where the polynomial becomes zero as a whole.

Given a polynomial 1/4(4\(x^{4}\) - 25\(x^{2}\) + 36)

1/4(4\(x^{4}\) - 25\(x^{2}\) + 36) = 0

(4\(x^{4}\) - 25\(x^{2}\) + 36) = 0

4\(x^{4}\) - 16\(x^{2}\) - 9\(x^{2}\) + 36= 0

4\(x^{4}\)(\(x^{2}\) - 4) - 9(\(x^{2}\) - 4) = 0

(4\(x^{4}\)-9)(\(x^{2}\) - 4) = 0

(x+2)(x-2)(2x+3)(2x-3) = 0

x = -2, 2, -3/2, 3/2

Hence, Zeros of the given polynomial are -2, 2, -3/2, 3/2

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Please help! Tysm!!! ❤✨

Please help! Tysm!!!

Answers

Answer:

B

Step-by-step explanation:

That's the only one that is 9/10 boxes long and 4/5 boxes wide

B! You’re welcome have a good day.

Urgent !!!

What does the absolute value of the correlation coefficient say about the predictions in part B? How do you know? Write an explanation of about one to two sentences

Part B attached

Urgent !!!What does the absolute value of the correlation coefficient say about the predictions in part

Answers

The line of best fit shows that Luther can expect the speed to be 51 miles/hour when he throws 80 pitches and 64 miles/hour when he throws 54 pitches.

How to calculate the speed?

The average speed of Luther's pitches when he throws 80 pitches will be:

y = -0.511x + 91.636

= -0.511(80) + 91.636

= 50.756

= 51

Also, the number of pitches that Luther can throw when the speed is 64 miles per hour will be:

y = -0.511x + 91.638

64 = -0.511x + 91.638

0.511x = 91.638 - 64

0.511x = 27.636

x = 54

Therefore, the number of pitches will be 54.

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Formula Which of the following is the total number of pennies on Rows 1-4 (the first 32 squares)? 232 – 1 232 232 1.

Answers

The total number of pennies on Rows 1-4 (the first 32 squares) is 232. The content loaded formula can be used to calculate the total number of pennies on the Rows 1-4 of the first 32 squares.

formula = 2^(n-1) + 2^(n-2) + 2^(n-3) + 2^(n-4) + 2^(n-5) + ……+ 2^1 + 2^0Where n = the number of rows The first four rows of the chessboard have 2^(4-1) = 8, 2^(4-2) = 4, 2^(4-3) = 2, and 2^(4-4) = 1 pennies respectively .The total number of pennies on the first 32 squares (Rows 1-4) is calculated using the following formula; Total = 8 + 4 + 2 + 1 = 15For the first four rows (the first 32 squares), the total number of pennies is 15. Hence, the correct option is 15.

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An investigator is studying the association between cell phone use and migraine headaches. She recruits 100 cases (migraine patients) and 100 controls (people who don't suffer from migraine), and asks each group how many hours they use their cell phones per day, on average. She obtains the following information:
cases controls
use cellphones
>3hrs/day
60 55
use cellphones
<3hrs/day
40 45
total 100 100
Calculate the observed odds ratio (the observed association between migraine headache and cell phone use).
OR = 0.82
OR = 1.23
OR = 1.11
OR = 3.45

Answers

The observed odds ratio (the observed association between migraine headache and cell phone use) is OR = 1.23.

An investigator is studying the association between cell phone use and migraine headaches.

100 cases (migraine patients) and 100 controls (people who don't suffer from migraine), and asks each group how many hours they use their cell phones per day, on average.

To calculate odd ratio ( exposure is cell phone as to check cell phone use on migraine)

Odds of disease in exposed = 60/55= 1.09

Odd of disease in non exposed = 40/45 = 0.88

Thus the odds ratio will be = 1.09:0.88

=> Odds of disease in exposed / odds of disease in non exposed = 1.09/ 0.88 = 1.23

= OR = 1.23

Hence the answer is the observed odds ratio (the observed association between migraine headache and cell phone use) is OR = 1.23.

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PLEASE HELP!!!
There are 6 classes going on a field trip. Each class has 28 students and 7 adults going on the trip. They are all traveling by van. Each van hold 9 passengers. What is the fewest number of vans they will need?

A.) 19

B.) 20

C.) 23

D.) 24

Answers

Answer:

D.24

Step-by-step explanation: 28 +7=35x6 divided by 9

explain the necessary condition that must be met in order to use a normal distribution to model the sampling distribution of p hat

Answers

The necessary condition to meet in order to use a normal distribution to model the sampling distribution of p^ is n×p and n×(1-p).

As per the question we have to determine the necessary condition that must be met in order to use a normal distribution to model the sampling distribution of p^.

In probability theory and statistics, the Normal Distribution, also called the Gaussian Distribution.

A large number of random variables are either nearly or exactly represented by the normal distribution.

The Normal Distribution is defined by the probability density function for a continuous random variable in a system.

Let us say, f(x) is the probability density function and X is the random variable.

Hence, it defines a function which is integrated between the range or interval (x to x + dx), giving the probability of random variable X, by considering the values between x and x+dx.

From the given information,

The required necessary condition is,

Both n×p and n×(1-p) to be at least 10.

Where, n is sample size and p is the probability of success.

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please help me add an explanation too pls

please help me add an explanation too pls

Answers

Answer:

42.5 inches

Step-by-step explanation:

because you gotta divide 349 by 8 to get ye height



Just these two please. Each pair of polygons is similar. Find the value of x.

Answers

Answer:

You are not showing any photos/images/text documents of the question. I need to see the picture you were given with

Step-by-step explanation:

Please give me answer to the question
This is all of my points

Please give me answer to the questionThis is all of my points

Answers

Answer:

It will be the answer , i think

Step-by-step explanation:

Let me know if it was wrong or you wanted further explanation .

Please give me answer to the questionThis is all of my points

between which two integers that Square Root of 11 Lie?​

Answers

Answer:

3 and 4

Step-by-step explanation:

Answer:

3 and 4

Step-by-step explanation:

represent 8/5 on number line​

Answers

Answer:

Step-by-step explanation:

--------|--------|---------|------||----|--------|---------|--------------------->

       -1         0         1    5/8  2        3         4                       ∞

Fill in the blanks
1.Estimation means finding a number that is_____enough to the_____answer.
2.Second step in converting is writing the conversion as a______.
3.When converting,the original unit should always be put in the_______.
4.Cancel any units that are both in the_______and denominator.
5.Indentifying the desired______is one of the important things you have to consider in solving word problems involving conversion.​

Answers

Answer:

1.close

2.fraction

3.word

5.nuimarator

Question
An employee makes $24 per hour during the normal week. This weekend that employee will make $36 per hour since it is a holiday. What is the percent increase in pay?

Answers

Answer:

The percent increase in pay is 50%.

Step-by-step explanation:

We need to find the percent increase from $24 to $36.

To solve this, we first must ask ourselves the question

36 is what percent of 24?

Y = P% of 24

36 = X · 24

To get X alone, we divide 36 by 24. That's 1.50. So now we know 36 is 150% of 24. Knowing 24 is 100%, we can find the percent increase. Well, how do we get from 100% (24) to 150% (36)? By increasing by 50%. Therefore, the percent increase in pay is 50%.

If x is a binomial random variable with n = 20 and p = 0.25, the expected value of x is:_________

Answers

The expected value with a sample size of 20 and a probability of 0.25 will be 5.

What is the expected value?

The anticipated value is an extension of the weighting factor in statistical inference. Informally, the anticipated value is the simple average of a significant number of outcomes of a randomly selected variable that was separately chosen.

The expected value is given below.

E(x) = np

Where n is the number of samples and p is the probability.

If x is a binomial random variable with n = 20 and p = 0.25. Then the expected value is given below.

E(x) = 20 x 0.25

E(x) = 5

The expected value with n = 20 and p = 0.25 will be 5.

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what is the z score for a soda that costs $1.15 if the population of soda prices has a normal distribution with a mean of $1.00 and a standard deviation of $0.25?

Answers

We need to know about z-score to solve the problem. The z-score of the soda is 0.6

A z-score tells you how many standard deviations away an individual data falls from the mean. We can calculate z-score from the standard deviation and mean of the data. In this question we know that the cost of a soda is $1.15 and the mean is $1.00 and the standard deviation is $0.25.We need to calculate the z-score of the soda with the given information.

z-score=x-μ/σ=1.15-1.00/0.25=0.15/0.25=0.6

Therefore the z-score of the soda is 0.6

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Which linear function has the steepest slope? Whoever answers this first I will mark them brainless

Which linear function has the steepest slope? Whoever answers this first I will mark them brainless

Answers

Answer:

y=-8x+5

Step-by-step explanation:

The others have a slope of -2, 7, and 6, which is not as steep as -8.

Answer:

A) y = -8x + 5

Step-by-step explanation:

Just took the test!

Correct me if I'm wrong!

Thank you

Tisa B Sora

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

Find f(7)

Answers

Answer:

7−x2−3x

Step-by-step explanation:

sorry if it's not right

A school ordered 3 large boxes of board markers. After giving 15 markers to each of 3 teachers, there were 90 markers left. How many markers were originally in the box?

Answers

Answer: 45 markers in each box.

Step-by-step explanation:
Initially, the school had 3 boxes of board markers, and each box had X board markers, where X is the number we want to find.
Then the initial number of board markers is 3*X.
We know that after giving 15 markers to 3 teachers, we have other 90 markers left. This can be written as:
total markers = markers for the teachers + markers left
3*X = 15*3 + 90 = 45 + 90 = 135
now, we divide both sides by 3.
X = 135/3 = 45
From this, we know that in each box we have 45 markers

(a) two lawn car companies are competing for a landscaping contract. company a charges $250 monthly consulting fee plus $10 per square foot of landscaping, whereas company b charges a $90 monthly consulting fee plus $12 per square foot of landscaping. for how many square feet of landscaping will the two companies charge the same amount?

Answers

Total charge by company A for 80 sq.feet = 250+10(80)= $1050

Total charge by company B for 80 sq.feet = 90+12(90)=$1170

Let x be the no.of square feet for landscaping

Company A

Monthly consulting fee = $250

Cost of landscaping of 1 sq.feet = $10

Cost of landscaping of x sq.feet = $10x

So, Total charge by company A = 250+10x  ---1

Company B

Monthly consulting fee = $90

Cost of landscaping of 1 sq.feet = $12

Cost of landscaping of x sq.feet = $12x

So, Total charge by company B = 90+12x   ---2

Now we are supposed to find  how many square feet of landscaping will the two companies charge the same amount

So, Equate 1 and 2

250+10x = 90+12x

160=2x

80=x

So, the two companies charge the same amount for 80 sq.feet

Total charge by company A for 80 sq.feet = 250+10(80)= $1050

Total charge by company B for 80 sq.feet = 90+12(90)=$1170

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Help yalll I really need help major time

Help yalll I really need help major time

Answers

Answer:

Annalise is correct because the outputs are closest when x = 1.35

Step-by-step explanation:

The solution to the equation 1/(x-1) = x² + 1 means the one x value that will make both sides equal. If we look at the table, notice how when x = 1.35, f(x) values are closest to each other for both equations, signifying that x = 1.35 is approximately the solution. Thus, Annalise is correct.


Given the matrices A =
2
2
3
4
B=
0
4
2
-3
C=
4
6
5
6
the matrix X in the equation (x-4b)a=c

Answers

Answer:

Hello,

Step-by-step explanation:

\(A=\begin{bmatrix}2 & 2 \\3 & 4 \end{bmatrix}\\\\\\B=\begin{bmatrix}0 & 4 \\2 & -3 \end{bmatrix}\\\\\\C=\begin{bmatrix}4 & 6 \\5 & 6 \end{bmatrix}\\\\\\(X-4B)*A=C\\\\X-4B=C*A^{-1}\\\\X=C*A^{-1}+4B\\\)

\(\begin{array}{|cc|cc|}A&&A^{-1}&\\---&---&---&---\\2&2&1&0\\3&4&0&1\\---&---&---&---\\1&1&\frac{1}{2}&0\\0&1&\frac{-3}{2}&1\\---&---&---&---\\1&0&2&-1\\0&1&\frac{-3}{2}&1\\---&---&---&---\\\end {array}\\\\\)

\(X=C*A^{-1}+4B=\begin{bmatrix}4 & 6 \\5 & 6 \end{bmatrix}*\begin{bmatrix}2&-1\\\frac{-3}{2}&1\end{bmatrix}+4*\begin{bmatrix}0 & 4 \\2 & -3 \end{bmatrix}\)

\(X=\begin{bmatrix}-1 & 2 \\1 & 1 \end{bmatrix}+\begin{bmatrix}0 & 16 \\8 & -12 \end{bmatrix}\\\\\\X=\begin{bmatrix}-1 & 18 \\9 & -11 \end{bmatrix}\\\)

Refer to Table S6.1 - Factors for Computing Control Chart Limits (3 sigma) for this problem. A quality inspector took the following samples of the length of time (in seconds) for glue to dry. Please round your calculations to three decimal places. Sample 1 Obs. 1 125 Obs. 3 122 Obs. 2 126 100 155 Obs. 4 132 121 118 Obs. 5 114 125 142 2 130 110 140 129 3 a) What is the value of ? x = seconds (round your response to three decimal places). b) What is the value of R? R= seconds (round your response to three decimal places). c) What are the UCL, and LCL, using 3-sigma? Upper Control Limit (UCL;) = seconds (round your response to three decimal places). Lower Control Limit (LCL;) = seconds (round your response to three decimal places). d) What are the UCLR and LCLR using 3-sigma? Upper Control Limit (UCLR) = seconds (round your response to three decimal places). Lower Control Limit (LCLR) = seconds (round your response to three decimal places).

Answers

To find the value of x, we calculate the average of the sample observations. Summing up the observations and dividing by the total number of observations, we get:

x = (125 + 122 + 126 + 100 + 155 + 132 + 121 + 118 + 114 + 125 + 142 + 2 + 130 + 110 + 140 + 129 + 3) / 17 = 114.118 seconds (rounded to three decimal places).b) To find the value of R, we calculate the range of each sample by subtracting the minimum observation from the maximum observation. Then we find the average range across all samples:R = (155 - 100 + 142 - 2 + 140 - 110 + 132 - 114 + 142 - 3) / 5 = 109.2 seconds (rounded to three decimal places).

c) The Upper Control Limit (UCL) and Lower Control Limit (LCL) using 3-sigma can be calculated by adding and subtracting three times the standard deviation from the average:UCL = x + (3 * R / d2) = 114.118 + (3 * 109.2 / 1.693) = 348.351 seconds (rounded to three decimal places).LCL = x - (3 * R / d2) = 114.118 - (3 * 109.2 / 1.693) = -120.115 seconds (rounded to three decimal places).

d) The Upper Control Limit Range (UCLR) and Lower Control Limit Range (LCLR) using 3-sigma can be calculated by multiplying the average range by the appropriate factor:UCLR = R * D4 = 109.2 * 2.115 = 231.108 seconds (rounded to three decimal places).LCLR = R * D3 = 109.2 * 0 = 0 seconds.

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Used car salesman paid 1500 for a car he plans to sell the car at 25% discount on Mars selling price but still wants to make a profit of 15% on his cost what should be the mark selling price of the car

Answers

SOLUTION

Cost price =1500

Selling price =?

Percentage Profit =15%

Profit is

\(\begin{gathered} \frac{15}{100}\times1500 \\ =225 \\ \end{gathered}\)

Selling price = Cost Price + Profit

Selling price = 1500+225

Selling price= 1725

Since he also wants to give a 25% discount,

The marked selling price can be gotten;

\(\begin{gathered} \frac{x-1725}{x}\times100=25 \\ 100x-172500=25x \\ \text{Collect the like terms} \\ 100x-25x=172500 \\ 75x=172500 \\ \text{Dividing both sides by 75} \\ \frac{75x}{75}=\frac{172500}{75} \\ x=2300 \end{gathered}\)

The mark selling price of the car is 2300

A small rectangular laptop has a width of 10 inches and an area of 80 square inches. A larger and similar laptop has a width of 15 inches. What is the length of the larger laptop?

Answers

The length of the smaller laptop is 8 inches.

The length of the larger laptop is 12 inches.

To find the length of the larger laptop, we can use the concept of similarity between the two laptops. Similar figures have proportional side lengths.

Given that the width of the smaller laptop is 10 inches and its area is 80 square inches, we can find its length as follows:

Area = length x width

80 = length x 10

Dividing both sides of the equation by 10, we get:

length = 80 / 10

length = 8 inches

Therefore, the length of the smaller laptop is 8 inches.

Since the larger laptop is similar to the smaller one, the ratio of corresponding side lengths is the same. The ratio of the widths is 15 inches / 10 inches = 1.5.

To find the length of the larger laptop, we multiply the width of the larger laptop by the same ratio:

length of larger laptop = 1.5 x 8 inches

length of larger laptop = 12 inches

Thus, the length of the larger laptop is 12 inches.

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The length of the larger laptop is 12 inches.

Given that, a small rectangular laptop has a width of 10 inches and an area of 80 square inches.

We know that, area of a rectangle is Length×Width.

Here, Length×10=80

Length=8 inches

A larger and similar laptop has a width of 15 inches

Let the length of a large laptop be x.

Now, 10/15 = 8/x

10x=120

x=12 inches

Therefore, the length of the larger laptop is 12 inches.

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Katie is 1.52 m tall. George is 6 cm shorter than Katie. How tall is George?
Give your answer in m

Answers

Answer:

1.46 cm

Step-by-step explanation:

You have to first convert meters into centimeters to make everything easier. (1m = 100cm)

1.52 meters is 152 centimeters

152-6 = 146 cm

146 cm divided by 100 is 1.46 meters

George is 1.46 meters tall

Hope this helps! :D

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