Please help I suck at maths Tysm if you do

Answer:

8

Step-by-step explanation:

5/2.5 = x/4

Cross Multiply

2.5x=20

Divide

8

The equation which matches the absolute value function graph given as required is; y = -1 |x + 1| + 1.

As evident from the task content, the equation which matches the given graph is to be determined.

On this note, recall that the absolute value function takes the form;

f (x) = a |x - h| + k where the vertex is; (h, k).

Therefore, since the vertex is; (-1, 1); we have;

f (x) = a |x + 1| + 1

To find a; use point (0, 0)

0 = a |0 + 1| + 1

a = -1.

Ultimately, the equation which matches the graph is; y = -1 |x + 1| + 1.

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For the two sample tests or Clin with m = 12 and n = 15.5, the number of degrees of freedom is (m + n - 2) which is (12 + 15.5 - 2) = 25.5. Since degrees of freedom must be a whole number, we round down to 25.
For the two sample tests or Clin with a sample size of -40.52 - 5,0 X (6), we need more information to determine the degrees of freedom.

In order to determine the number of degrees of freedom for a two-sample t-test, you need to use the following formula:

Degrees of freedom (df) = (m - 1) + (n - 1)

where m and n are the sample sizes of the two groups being compared.

In the given question, there seem to be some errors in the values provided. However, let me explain the steps using the available values:

1. m = 12 (assuming this is the sample size of the first group)
2. n = 15.5 (assuming this is the sample size of the second group, but sample sizes should be whole numbers, so it should be rounded down to 15)
3. Apply the formula:

Degrees of freedom (df) = (12 - 1) + (15 - 1)

4. Calculate the degrees of freedom:

Degrees of freedom (df) = 11 + 14 = 25

So, the number of degrees of freedom for the two-sample test in this situation is 25.

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In summary, the typical period of time used in a short-interval schedule is one week.

A short-interval schedule is a type of work schedule used by employers to plan and assign work hours to their employees in a more frequent and flexible manner. The typical period of time used in a short-interval schedule is one week.

This means that instead of planning out work schedules for longer periods such as a month or a quarter, employers using short-interval schedules plan work schedules for shorter periods of time, typically one week. This allows employers to adjust the work schedules based on changes in demand, production, or employee availability.

Short-interval schedules are often used in industries that have fluctuating demands or that require a high level of flexibility. Examples of such industries include retail, hospitality, and healthcare. With short-interval schedules, employees can work different shifts and hours each week, which can help them to balance their work and personal lives.

In summary, the typical period of time used in a short-interval schedule is one week.

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Rounded to the nearest whole degree, the F region would be represented by 30 degrees on the pie chart.

The total number of students who completed the Spanish course is:

67 + 95 + 111 + 87 + 33 = 393

To find the number of degrees for the F region on the pie chart, we need to first find the percentage of students who failed the course:

33/393 x 100% = 8.39%

To convert this percentage to degrees, we use the formula:

(degrees in a circle) x (percentage/100) = degrees in the sector

Since a circle has 360 degrees, we can plug in the values to get:

360 x (8.39/100) = 30.24 degrees

Rounded to the nearest whole degree, the answer is 30 degrees. Therefore, 30 degrees would be used to indicate the F region on the pie chart.

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If three coins are thrown, the probability of obtaining at least one head is 0.875.

Probability refers to likely of an event occurring. The probability of an event occurring is expressed as

P = [tex]\frac{favourable\,outcome}{Total\,number\,of\,outcome}[/tex]

The events that can occur when three coins are thrown are HHH, HHT, HTH, HTT, TTT, TTH, THT, THH where T is the tail side obtained

and H is the head side obtained.

Total number of outcomes possible = 8

The events in which at least one head is obtained are HHH, HHT, HTH, HTT, THH, THT, TTH

Number of events in which at least one head is obtained = 7

Probability = [tex]\frac{7}{8}[/tex] = 0.875

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The driving time along this stretch was reduced by 36% for a person who always drives at the speed limit.

To calculate the percent reduction in driving time along the stretch, we need to consider the effects of both the distance decrease and the speed increase.

First, let's assume the original distance of the stretch was D. After the reconstruction, the distance is now 0.8D (since it was decreased by 20%).

Next, let's assume the original speed limit was S. After the reconstruction, the speed limit is now 1.25S (since it was increased by 25%).

To calculate the original driving time along the stretch, we would use the formula: time = distance / speed. So the original driving time would be D/S.

After the reconstruction, the driving time would be (0.8D) / (1.25S) = 0.64D/S.

To calculate the percent reduction in driving time, we can use the formula: (original time - new time) / original time * 100%.

Plugging in the values we calculated, we get:

(original time - new time) / original time * 100% = (D/S - 0.64D/S) / (D/S) * 100% = 36%.

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Therefore, Vang will still be 55 miles away from Fort Worth after driving for 2 hours at 65 miles per hour.

The problem is asking us to find how far Vang will be from Fort Worth after driving for 2 hours at a speed of 65 miles per hour. To solve the problem, we can use the formula: distance = rate x time, where rate is the speed or miles per hour, and time is the duration of the travel in hours. So, for the first step, we need to multiply the number of hours (2) by the number of miles per hour (65), which gives us:

distance = rate x time

distance = 65 x 2

distance = 130 miles

This means that after driving for 2 hours at 65 miles per hour, Vang will be 130 miles away from Fort Worth. To find how far he still needs to travel to reach Fort Worth, we need to subtract the distance he has already driven (130 miles) from the total distance to Fort Worth (185 miles):

distance remaining = total distance - distance driven

distance remaining = 185 - 130

distance remaining = 55 miles

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A baseball diamond is a square with a distance of 90ft from home base to first base the area of the baseball, diamond is 8100 square feet.

A baseball precious stone could be a square with a separate of 90ft from the home base, to begin with, a base. Since it could be a square, all sides have the same length, which is 90ft.

To discover the region of the square (baseball jewel), we are able to utilize the equation:

Region = side x side

Substituting the esteem of the side, we get:

Zone = 90ft x 90ft

Rearranging, we get:

Zone = 8100 square feet

In this manner, the zone of the basketball jewel is 8100 square feet. 

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Answer: The new ratio of men to women on the bus is 2 to 7 in simplest form.

Step-by-step explanation:

If the ratio of men to women on the city bus is 3 to 4, then the total number of parts in the ratio is 3+4 = 7. This means that 3/7 of the people on the bus are men and 4/7 are women.

If there are 28 people on the bus, then the number of women on the bus is:

4/7 * 28 = 16

If 4 women get off the bus, then the new number of women on the bus is:

16 - 4 = 12

The new total number of people on the bus is:

28 - 4 = 24

The new ratio of men to women can be found by dividing the number of men by the number of women:

3/7 : 12/24

Simplifying the ratio by dividing both sides by 3, we get:

1/7 : 4/8

Simplifying further by dividing both sides by 2, we get:

1/7 : 1/2

Therefore, the new ratio of men to women on the bus is 1 to 7/2 or 2 to 7 in simplest form.

The value of the angles are x= 45 degrees and b = 90 degrees. Option B

To determine the values, we need to take note of the some properties of a triangle.

These properties include;

From the diagram shown, we can deduce that;

The interior angles of the triangle are;

x + 45 + 90 =1 80

Now, collect the like terms

x + 135 = 180

Make 'x' subject

x = 45 degrees

Then, the value of the right angle b = 90 degrees

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Answer:

g ≤ 100.

Step-by-step explanation:

To solve the inequality g/20 ≤ 5 for g, we can multiply both sides by 20 to get rid of the fraction. This gives us g ≤ 100. So the solution to the inequality is g ≤ 100.

Answer:S Less then 5

Step-by-step explanation:

None of the options provided is correct. The closest option is (b) 0.12, but this is actually the standard deviation, not the SEM.

The standard deviation (SD) is a measure of the amount of variation or dispersion in a set of data. It is calculated as the square root of the variance, which is the average of the squared differences from the mean.

In the context of the question you provided, a simple random sample of 100 observations was taken from a large population, and the sample standard deviation was determined to be 12. This means that the data points in the sample were, on average, 12 units away from the sample mean.

The standard deviation is important in statistics because it allows us to quantify the spread of data and identify outliers or unusual observations. It is often used in conjunction with other measures of central tendency, such as the mean or median, to describe the characteristics of a dataset.The standard error of the mean (SEM) can be calculated using the formula:

SEM = standard deviation / √sample size

In this case, the sample size is 100, the sample mean is 80, and the standard deviation is 12.

Therefore, the SEM = 12 / √100 = 1.2

So, none of the options provided is correct. The closest option is (b) 0.12, but this is actually the standard deviation, not the SEM.

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The value of Cos M would be 0. 91.

Using the Cosine function requires knowing the dimensions for the Hypotenuse and the Adjacent measurement.

We can use the Pythagorean Theorem to find the Adjacent angle as:

= (√78)² - ( √14) ²

= √ (78 - 14)

= 8 units

The value of Cos M is therefore :

Cos M = 8 / √78

Cos M = 8 / 8.83

Cos M = 0. 91

In conclusion, the value of Cos M, to the nearest hundredth, is 0. 91.

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Answer:

measurement of each interior angle of a regular hexagon is 120°

sum of the numbered angles is 720°

Step-by-step explanation:

m<1 = 120°

m<2 = 120°

m<3 = 120°

the sum of the all the numbered six interior angles of a regular hexagon = 720°

The ball is in the air for approximately 11.1 seconds before hitting the ground.

a. The function model for United Savings and Trust is:

S(t) = 1000 + 5t

where S(t) is the amount of money in the savings account at time t.

b. The function model for Bulldog Bank & Trust is:

S(t) = 1000(1 + 0.07/12)^(12t)

where S(t) is the amount of money in the savings account at time t.

c. The function model for Falcon Federal is:

S(t) = 1000e^(0.07t)

where S(t) is the amount of money in the savings account at time t.

To find how much money Austin would have in each account at the end of 3 years:

a. S(36) = 1000 + 5(36) = $1180

b. S(36) = 1000(1 + 0.07/12)^(1236) = $1431.22

c. S(36) = 1000e^(0.0736) = $1432.82

Therefore, option c (Falcon Federal) would give Austin the most money at the end of 3 years, as it has the highest final value.

Let a, c, and s be the number of adult, child, and senior citizen tickets sold, respectively. Then we have:

15a + 12c + 10s = 1515

This equation represents the total amount collected in ticket sales, given the number of each type of ticket sold.

a. When Evan hits the golf ball, t = 0. Therefore, we can find the height by evaluating h(0):

h(0) = -16(0)^2 + 180(0) + 30 = 30 feet

So Evan is standing 30 feet off the ground when he hits the golf ball.

b. The maximum height occurs at the vertex of the parabola, which has x-coordinate -b/2a = -180/-32.2 ≈ 5.59 seconds. Therefore, we can find the maximum height by evaluating h(5.59):

h(5.59) = -16(5.59)^2 + 180(5.59) + 30 ≈ 164.9 feet

So the maximum height reached by the golf ball is approximately 164.9 feet.

c. To find the time it takes for the ball to hit the ground, we need to solve the equation h(t) = 0:

0 = -16t^2 + 180t + 30

Using the quadratic formula, we get:

t = (-b ± sqrt(b^2 - 4ac))/2a

t = (-180 ± sqrt(180^2 - 4(-16)(30)))/(2(-16))

t ≈ 11.14 seconds or t ≈ 0.62 seconds

Since the ball is hit from a height of 30 feet, we can disregard the negative solution and round the positive solution to the nearest tenth of a second. Therefore, the ball is in the air for approximately 11.1 seconds before hitting the ground.

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The scale factor is 1/4.

We have,

To find the scale factor, we can compare the corresponding side lengths of the original triangle and the dilated triangle.

Let's focus on side AB and A'B'.

The length of AB is:

√((12 - (-8))² + (12 - (-8))²) = √(400 + 400) = √(800)

The length of A'B' is:

√((3 - (-2))² + (3 - (-2))²) = √(25 + 25) = √(50)

The scale factor is the ratio of the length of the corresponding sides, which is:

√(50) / √(800) = 1 / √(16) = 1 / 4

Thus,

The scale factor is 1/4.

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Answer:

1/4 is the scale factor

Step-by-step explanation:

The value of w using the equation w + 45 = w + 12 + w - 23 is 56

From the question, we have the following parameters that can be used in our computation:

w+12°

w+45°

w-23°

Assuming an equation to solve w, we have

w + 45 = w + 12 + w - 23

Evaluating the like terms, we have

w + 45 = 2w - 11

Collecting the like terms, we have

-w = -56

Divide by -1

w = 56

Hence, the value of w is 56

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The 99% confident interval that the true population mean for the pages per book in the library falls within the range of 313 to 355 pages.

To calculate a confidence interval at the 99% confidence level for the pages per book in a library, you will need the following parameters:

1. Sample mean (x): 334 pages (given)
2. Population standard deviation (σ): 33 pages (given)
3. Sample size (n): 16 books (given)
4. Z-score (z) corresponding to the 99% confidence level: 2.576 (from the provided z-values)

Now, let's calculate the confidence interval using these parameters:

Step 1: Calculate the standard error (SE) of the sample mean:
SE = σ / √n = 33 / √16 = 33 / 4 = 8.25

Step 2: Multiply the Z-score by the standard error:
Margin of error (ME) = z * SE = 2.576 * 8.25 ≈ 21.25

Step 3: Add and subtract the margin of error from the sample mean to find the confidence interval:
Lower endpoint: x - ME = 334 - 21.25 ≈ 312.75
Upper endpoint: x + ME = 334 + 21.25 ≈ 355.25

Step 4: Round the final confidence interval endpoints to the nearest whole number:
Lower endpoint: 313
Upper endpoint: 355

So, the 99% confidence interval for the pages per book in the library is approximately 313 to 355 pages.

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To achieve a 95% confidence interval with a margin of error of 3%, you'd need to poll approximately 1,112 people.

To estimate the number of people you'd need to poll for a 95% confidence interval with a margin of error of 3% (0.03), we'll use the following formula:

Sample size (n) = (Z^2 * SD^2) / E^2

Where:
- Z = 2 (for a 95% confidence interval)
- SD = 0.5 (the standard deviation of the population)
- E = 0.03 (the margin of error)

Step 1: Square the Z-score (Z^2):
2^2 = 4

Step 2: Square the standard deviation (SD^2):
0.5^2 = 0.25

Step 3: Square the margin of error (E^2):
0.03^2 = 0.0009

Step 4: Multiply Z^2 by SD^2:
4 * 0.25 = 1

Step 5: Divide the result from Step 4 by E^2:
1 / 0.0009 = 1,111.11

Since we can't have a fraction of a person, we'll round up to the nearest whole number.

So, to achieve a 95% confidence interval with a margin of error of 3%, you'd need to poll approximately 1,112 people.

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Since the distance from a point to point C is 1 and the distance from that same point to point B is 4, the point must be: C. point D.

In Mathematics and Geometry, a number line simply refers to a type of graph with a graduated straight line which comprises both positive and negative numbers that are placed at equal intervals along its length.

This ultimately implies that, a number line primarily increases in numerical value towards the right from zero (0) and decreases in numerical value towards the left from zero (0).

From the number line shown above, we have:

Distance = 4 + (-1)

Distance = 4 - 1

Distance = 3 (point D).

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Since alternative angles are equal

[tex](7x - 15) = 97[/tex]

[tex]7x = 97 + 15[/tex]

[tex]7x = 112[/tex]

[tex]x = \frac{112}{7} [/tex]

[tex]x = 16[/tex]

Answer:

x = 16

Step-by-step explanation:

The angle (7x - 15) is vertical to the 97° angle, meaning they will be equal.

Find the value of x.

7x - 15 = 97°

7x = 112

x = 16

The letter "r" is commonly used in experimental design symbols/terminology to represent "random assignment of research subjects (e.g., people) to groups (experimental and control)".

Random assignment is a critical component of experimental design as it helps to control for extraneous variables that may affect the outcome of the study. By randomly assigning participants to different groups, researchers can ensure that any differences in the outcome variables between groups are due to the independent variable being manipulated and not to other factors.

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To find the largest interval astsb such that a unique solution of the given initial value problem is guaranteed to exist, we need to consider the conditions for the existence and uniqueness of solutions for first-order ordinary differential equations.

Specifically, for the initial value problem y'(x) = f(x,y(x)), y(x0) = y0, where f(x,y) is a continuous function in some rectangular region containing the point (x0,y0), the existence and uniqueness theorem states that there exists a unique solution y(x) defined on some interval (a,b) containing x0, and that this solution is continuous and differentiable on the interval (a,b).
Furthermore, the theorem states that if f(x,y) and ∂f/∂y are continuous in some rectangular region containing (x0,y0), then the solution y(x) exists and is unique in some interval (a,b) containing x0.
Therefore, to find the largest interval astsb such that a unique solution is guaranteed to exist, we need to ensure that both f(x,y) and ∂f/∂y are continuous in some rectangular region containing the initial point (x0,y0). We can use this information to determine the domain of the solution by checking for any discontinuities or singularities in the function f(x,y) that may cause the solution to become non-unique.
Overall, the largest interval astsb for which a unique solution is guaranteed to exist will depend on the specific function f(x,y) and the initial conditions given. We may need to use numerical methods or other techniques to approximate the solution if the interval is too large or if the function is too complex to solve analytically.

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The shapes describe the cross section formed by the slice are

A.square

B.triangle

C.hexagon

D.pentagon

We have a shape of cube.

We know that a cube consist all square faces.

So, if we cut the cube diagonally we get shape of Rectangle.

and, if cut vertically or horizontally we get square.

Similarly by cutting in different edge we get hexagon and Pentagon.

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Ze and function doesn't seem to relate to the provided data and summaries about concentration of bacteria in carpeted and uncarpeted rooms.

However, based on the given information, the approximate degrees of freedom for the t-statistic cannot be determined as it is not specified how many observations were made in each type of room. The terms "Ze" and "function" are also not relevant to this question.
Based on your question, you would like to know the approximate degrees of freedom for the t-statistic when comparing the concentration of bacteria in carpeted and uncarpeted rooms. The given data includes:
Carpeted rooms: n1 = 184, X1 = 22.0
Uncarpeted rooms: n2 = 175, X2 = 16.9
To find the approximate degrees of freedom for the t-statistic, you can use the following formula:
d f ≈ (s1²/n1 + s2²/n2)² / [(s1²/n1)²/(n1-1) + (s2²/n2)²/(n2-1)]
However, the given information does not provide the sample standard deviations (s1 and s2) for the two groups, which are necessary to calculate the degrees of freedom. Therefore, it is not possible to provide an accurate answer with the provided information.

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Answer:

Angle N= 5×18°=90°

Angle O=4×18°=72°

Angle M=1×18°=18°

Step-by-step explanation:

Let M be 1 unit

Angle N is 5 units

Angle O is 4 units

5+4+1 =10 unites

All angles in a triangle add up to 180°

180°÷10=18° per unit

Angle N= 5×18°=90°

Angle O=4×18°=72°

Angle M=1×18°=18°

The future values of the investment for each interest rate are:
1. $39,871.83
2. $42,593.30
3. $47,886.42
4. $54,946.66

To calculate the future value of the investment, we can use the compound interest formula:
A = P(1 + r/n)^(nt) where A is the future value, P is the principal amount, r is the interest rate, n is the number of times interest is compounded per year, and t is the number of years.
In this case, the principal amount (P) is $32,000, interest is compounded daily (n = 365), and the investment period is 7 years (t = 7).
1. If r = 3.5%, then the investment is worth:
A = 32000(1 + 0.035/365)^(365*7)
A ≈ $39,871.83
2. If r = 4.5%, then the investment is worth:
A = 32000(1 + 0.045/365)^(365*7)
A ≈ $42,593.30
3. If r = 6%, then the investment is worth:
A = 32000(1 + 0.06/365)^(365*7)
A ≈ $47,886.42
4. If r = 8%, then the investment is worth:
A = 32000(1 + 0.08/365)^(365*7)
A ≈ $54,946.66

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The statement that best describes the distribution is this: The distribution is skewed right.

To interpret the direction in which the distribution is skewed, we need to observe the part to which the longest bar appears. From the picture of the graph obtained from online sources, the bars lean towards the left and this is how we can say that the distribution is skewed right.

The longest bar in the distribution tells us the number of phone calls with the highest frequency. Histograms are graphical means of interpreting data.

Complete Question:

Which statement best describes the distribution?

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To cause the particle to move to the right at 51 m/s, the net work done on it must be equal to the change in kinetic energy. The initial kinetic energy of the particle is (1/2)mv^2 = (1/2)(40 g)(25 m/s)^2 = 31,250 J. The final kinetic energy of the particle is (1/2)mv^2 = (1/2)(40 g)(51 m/s)^2 = 52,020 J. Therefore, the net work done on the particle is 52,020 J - 31,250 J = 20,770 J.

To solve this problem, we'll use the work-energy theorem, which states that the net work done on an object is equal to its change in kinetic energy:

W = ΔKE = KE_final - KE_initial

First, we need to calculate the initial and final kinetic energies (KE) of the particle:

KE_initial = (1/2) * m * v_initial^2
KE_final = (1/2) * m * v_final^2

Given that the particle has a mass (m) of 40 g (0.04 kg) and initial velocity (v_initial) of -25 m/s (negative because it's moving to the left), we can find KE_initial:

KE_initial = (1/2) * 0.04 kg * (-25 m/s)^2 = 12.5 J

Similarly, with a final velocity (v_final) of 51 m/s (positive because it's moving to the right):

KE_final = (1/2) * 0.04 kg * (51 m/s)^2 = 52.404 J

Now, calculate the net work (W):

W = ΔKE = KE_final - KE_initial = 52.404 J - 12.5 J = 39.904 J

Expressed to two significant figures, the net work done on the particle is:

W ≈ 40 J

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