Please help! I’m not good with y=mb+x

Answer:

if people don't help u could always ask for help from ur teacher

1) The proportion of children with significant social activity in children with ALL is 0.805 (1020 out of 1272). The proportion of children with significant social activity in children without ALL is 0.858 (5343 out of 6238).

2) The upper bound of the 95% confidence interval for the odds ratio of ALL associated with significant social activity is 1.32. This means that there is a 95% chance that the true odds ratio is between 1.32 and infinity.

In other words, the study found that children with significant social activity were more likely to develop ALL than children without significant social activity. However, the study was observational, so it cannot be concluded that significant social activity caused ALL. There may be other factors that explain the association between significant social activity and ALL. For example, children who are more outgoing may be more likely to be exposed to germs, which could increase their risk of developing ALL.

Here are some additional details about the study:

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In statistics, the "z-score" is used to determine how far away from the mean a data point is. It indicates how many standard deviations the data point is from the mean.

The formula for calculating the z-score is given below:

z = (x - μ) / σ

where: x = data point

           μ = population mean

           σ = population standard deviation

Given a normal population with a mean of 21 and a standard deviation of 6, we can compute the z-score associated with 24 as follows:

z = (x - μ) / σz = (24 - 21) / 6z = 0.50

To compute the z-value associated with 24, we use Appendix B.3 which gives the area under the normal distribution curve for different z-scores.

Looking at Appendix B.3, we find that the area to the left of z = 0.50 is 0.6915 (rounded to 4 decimal places). Therefore, the z value associated with 24 is 0.50.

Note: The answer has been provided in less than 100 words, but the computation involved has been thoroughly explained.

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Answer:

18 hours

Step-by-step explanation:

Divide the total amount by the hours worked to find the dollars per hour rate.  Next, take the amount of money you're looking for hours for and divide it by the dollars per hour rate and the quotient is the hours necessary to work to earn the money

Answer:

18 hours

Step-by-step explanation:

We can use a ratio to solve

132 dollars        216 dollars

---------------- = ------------------

11 hours           x hours

Using cross products

132 x = 216 *11

132x=2376

Divide by 132

132x/132 = 2376/132

x = 18

Answer:

the graph of f represents a direct variation

Step-by-step explanation:

All direct variations are going to be linear functions, thus the graph of f represents a direct variation. However, I will give you a longer way to solve this problem, a more visual one, that will help understand this concept in an easier manner.

the basic formula for a direct variation is "y = k·x" and the basic formula for an inverse variation is "y = [tex]\frac{k}{x}[/tex]" (with k representing any costant)

we can solve this question by using the basic formulas to write inverse and direct variations, graph them, and see which one is the most similar to the one given in the question.

Since line f has a slope of 2, I decided to use 2 as the constant for both functions. Now we just substitute k for 2 in each function and graph it.

direct variation: y = 2x

inverse variation: y = [tex]\frac{2}{x}[/tex]

After re-writting the functions, I graphed them on desmos to see what they would look like. After comparing the original graph to the ones I created on Desmos, it can be seen that the red line graph (direct variation) is identical to the original one. Thus, the graph of f represents a direct variation.

p.s.: be familiar with teh formulas for direct and indirect variation, as they will be used a lot in the years to come (regaring math classes), even in AP Calculus

hope this helps! :)

Answer:

The Gonzales family used the water sprinkler for 20 hours

The Brown family used the water sprinkler for 35 hours

Step-by-step explanation:

Let represent

Number of hours that the Gonzales family used the water sprinkler = x

Number of hours that the Brown family used the water sprinkler = y

The families used their sprinklers for a combined total of 55 hours

Hence,

x + y = 55 ...... Equation 1

x = 55 - y

The water output rate for the Gonzales family sprinkler was 35 L per hour.

35L × x = 35x

The water output rate for the brown family's sprinkler was 30 L per hour.

30L × y = 30y

The families used their sprinklers for a combined total of 55 hours, resulting in a total water output of 1750 L.

Hence, we have:

35x + 30y = 1750..... Equation 2

Substitute x = 55 - y in Equation 2

35(55 - y) + 30y = 1750

1925 - 35y + 30y = 1750

Collect like terms

1925 - 1750 = 35y - 30y

175 = 5y

y = 175/5

y = 35 hours

Since:

x = 55 - y

x = 55 - 35

x = 20 hours

Since Number of hours that the Gonzales family used the water sprinkler = x,

The Gonzales family used the water sprinkler for 20 hours

Since number of hours that the Brown family used the water sprinkler = y,

Hence, the Brown family used the water sprinkler for 35 hours

Answer:

there are 100 centimetre in a meter.

Step-by-step explanation:

hope this

will help

you!

Answer:

100

Step-by-step explanation:

..................

Answer:D

Step-by-step explanation:

An Experiment is repeated 10 times compared to just 3 times, the results from the 10 repetitions would generally be considered more reliable.

True.

In general, conducting an experiment multiple times increases the reliability of the results. The more times an experiment is repeated, the greater the opportunity to collect data and observe patterns or trends. This allows for a more robust analysis and reduces the impact of random variations or errors that may occur in a single trial.

When an experiment is repeated multiple times, it helps to reduce the effects of outliers or anomalies that may occur in a single trial. By averaging the results over multiple repetitions, the overall outcome tends to be more representative and reliable.

In the context of statistical analysis, increasing the sample size (number of repetitions) can lead to more precise estimates of parameters and reduce the margin of error. It provides a better understanding of the underlying phenomenon being studied and allows for more confident conclusions.

Therefore, if an experiment is repeated 10 times compared to just 3 times, the results from the 10 repetitions would generally be considered more reliable. The larger sample size provides a stronger basis for drawing conclusions and making inferences about the population or phenomenon under study.

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The given operational problem relates to production or manufacturing, with decision variables representing the quantities of the two products to be produced and an objective function representing the specific goal to be achieved (such as maximizing profit or minimizing costs).

Based on the information provided, it appears that the given scenario relates to a production or manufacturing problem. The problem involves the production of two different products, Product 1 and Product 2, and requires specific quantities of different resources or components.

Decision Variables:

The decision variables in this operational problem could include the quantities or amounts of each product to be produced. For example, let's denote the quantity of Product 1 as x and the quantity of Product 2 as y.

Objective Function:

The objective function represents the goal or objective of the problem. In this case, the objective could be to maximize or minimize a certain aspect, such as profit, production efficiency, or resource utilization. The specific objective function would depend on the specific goal of the problem. For example, if the objective is to maximize profit, the objective function could be expressed as a linear combination of the quantities produced and the associated costs and revenues.

Since the specific objective function is not provided in the question, it is not possible to determine it accurately. However, it could involve maximizing profit, minimizing production costs, or maximizing resource utilization efficiency, among other possibilities.

In summary, the given operational problem relates to production or manufacturing, with decision variables representing the quantities of the two products to be produced and an objective function representing the specific goal to be achieved (such as maximizing profit or minimizing costs).

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Pie charts are effective in conveying percentages and are commonly used in data analysis and presentations.

The true statement about pie charts is that they are effective in showing percentages. Pie charts are a common data visualization tool used to represent proportions or percentages of a whole.

The chart is divided into slices, with each slice representing a specific category or data point. The size of each slice is proportional to the percentage it represents within the whole.

This visual representation makes it easier for viewers to understand the distribution and relative proportions of different categories or variables. Pie charts are therefore frequently used in data analysis and presentations because they are good at communicating percentages.

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Answer:

a) Finding value of y:

8y+4+4y+7=107

12y+11=107

12y =107-11

12y =96

y = 96/12

y = 8

b) RS= 8y+4

= 8(8)+4

= 64+4

= 68

ST= 4y+7

= 4(8)+7

= 32+7

= 39

Answer:

Perpendicular Line : y = -3x + 6

Step-by-step explanation: Find the negative reciprocal of the slope of the original line and use the point-slope formula y-y1 = m (x-x1) to find the line perpendicular to x-3y=3.

I hope this helps you out. If not, I am really sorry.

Answer:

Perpendicular Line : y = -3x + 6

Step-by-step explanation:

Answer:

B. (-2, -1)

Step-by-step explanation:

Step-by-step explanation:

Answer option B - ( -2, -1)

Answer:

x = 15

Step-by-step explanation:

add 5 on both sides

subtract 2 on both sides

divide 1 on both sides

then x = 15

Answer:

9

Step-by-step explanation:

The speed of the train in miles per hour which is the ratio of the total distance covered and the total time taken to cover the distance is 9.79 mph

Speed is measured as distance moved over time. The formula for speed is speed = distance ÷ time. To work out what the units are for speed, you need to know the units for distance and time. In this example, distance is in metres (m) and time is in seconds (s), so the units will be in metres per second (m/s).

Speed = Distance/ Time.

Here, we have,

Total distance covered = 7 and 5/6 miles = 7.83333 miles

Total time taken = 4/5 of an hour = 0.8 hour

Recall :

Speed in miles per hour = Distance covered / time taken

The speed of the train = 7.833333 ÷ 0.8 = 9.7916

The speed of the train in miles per hour = 9.79 mph

Therefore, the speed of the train in miles per hour as calculated from the distance covered by the train over a certain period of time is 9.79 mph

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complete question;

The train ride at the zoo covers a distance of 7 and 5/6 miles in 4/5 of an hour. How many miles per hour does the train go?

Answer:

Jaime

Step-by-step explanation:

Jaime claims that when you multiply a whole number by 100, the decimal point moves 2 places to the right. Salome argues that the decimal point only moves when you multiply a decimal by 100. Salome says that when you multiply a whole number by 100, the product has 2 extra zeros. Who is correct?

Jaime is more correct

When converting a DECIMAL into percentage (%), decimal points will move two places to the LEFT

When multiplying a WHOLE number by 100, the decimal point moves two places to the RIGHT.

Answer: Independent vairable: the variable being changed in an experiment. Dependent variable: the variable that causes the change in an experiment. Domain: the first and last points on a graph on the x part. (think of it as how much it goes across) Range: the first and last points on a graph on the y part. (Think of it as how much it goes up or down.)

Sorry this is the only part i have the answer to!

Answer:

s-b-t-s-w

Step-by-step explanation:

Answer: answer is B

Step-by-step explanation: I took the test.

Answer:

5

Step-by-step explanation:

to cancel out the bottom part of the fraction, we multiply by 3. so now we have y+1= 6. we subtract 1, and get y=5

Answer:

[tex]y=-x^2+12x-27[/tex]

Step-by-step explanation:

The general equation of the parabola is [tex]y=ax^2+bx+c[/tex]

As the parabola passes through [tex](3,0),(9,0)[/tex]

[tex]0=9a+3b+c\,\,\,...(i)\\0=81a+9b+c\,\,\,...(ii)[/tex]

Subtract (i) from (ii)

[tex](81a+9b+c)-(9a+3b+c)=0\\72a+6b=0\\12a+b=0\\b=-12a[/tex]

Also, the parabola passes through [tex](10,-7)[/tex],

[tex]-7=100a+10b+c\,\,\,...(iii)[/tex]

Subtract (i) from (iii)

[tex](100a+10b+c)-(9a+3b+c)=-7-0\\91a+7b=-7[/tex]

Put [tex]b=-12a[/tex]

[tex]91a+7(-12a)=-7\\91a-84a=-7\\7a=-7\\a=-1[/tex]

Put [tex]a=-1[/tex] in [tex]b=-12a[/tex]

[tex]b=-12(-1)=12[/tex]

Put [tex]a=-1,b=12[/tex] in (i)

[tex]0=9a+3b+c\\0=-9+36+c\\0=27+c\\c=-27[/tex]

So, equation is [tex]y=-x^2+12x-27[/tex]

The equation of the parabola is y = -x² + 12x - 27

Parabola is the locus of a point such that the same distance from a fixed line, called the directrix, and a fixed point (the focus) is the same.

The equation of a parabola is in quadratic form. Hence it is given as:

y = ax² + bx + c

At point (3, 0):

0 = a(3²) + b(3) + c

9a + 3b + c = 0      (1)

At point (9, 0):

0 = a(9²) + b(9) + c

81a + 9b + c = 0      (2)

At point (10, -7):

-7 = a(10²) + b(10) + c

100a + 10b + c = -7      (3)

Solving equations 1, 2, 3 gives: a = -1, b = 12, c = -27

The equation of the parabola is hence y = -x² + 12x - 27

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According to the empirical rule, approximately 95% of the data falls within two standard deviations of the mean. Therefore, the approximate percentage of daily phone calls numbering between 35 and 75 is 95%.

We have been given that the number of phone calls answered each day by each of the 12 receptionists is bell-shaped and has a mean of 55 and a standard deviation of 10.

We are asked to find out the approximate percentage of daily phone calls numbering between 35 and 75 using the empirical rule.

The empirical rule is used to describe how many of the observations fall within a certain distance of the mean in a normal distribution of data.

The empirical rule states that approximately 68% of the data falls within one standard deviation of the mean, 95% falls within two standard deviations of the mean, and 99.7% falls within three standard deviations of the mean.

To use the empirical rule, we first need to find the z-scores for the values of 35 and 75. We can use the formula

z = (x - μ) / σ,

where x is the value we want to find the z-score for, μ is the mean of the distribution, and σ is the standard deviation of the distribution.

For x = 35, we have

z = (35 - 55) / 10 = -2, and

for x = 75, we have

z = (75 - 55) / 10 = 2.

So, the values of 35 and 75 are 2 standard deviations away from the mean. According to the empirical rule, approximately 95% of the data falls within two standard deviations of the mean.

Therefore, the approximate percentage of daily phone calls numbering between 35 and 75 is 95%.

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Answer:

if it explaining it you will have to add the answer then add the x

Step-by-step explanation:with your answer whiches A

Answer:

y = 2x +1

Step-by-step explanation:

y=kx+1

Substitute the point into the equation

3 = k(1) + 1

3 = k+1

Subtract 1 from each side

3-1 = k

2 = k

y = 2x +1

The slope is 2 and the y intercept is 1

Answer:

120960 seconds

Step-by-step explanation:

Answer:

-135

Step-by-step explanation:

tn=ar^n-1

   =5*(-3)^4-1

    =5*(-3)^3

     =-135

Answer:

14

Step-by-step explanation:

if the number of tortillas to total packages is 7:16, that would mean that the number of tortillas is a multiple of 7.