The ratio of girl to boys in mr Day class is 3 to 5 . If there is 15 boys in mr Day class how many more boyz are there then girls

Answer:

The possible radius and height for the inside of the cylinder that meets the constraints are r = 4 cm and h = 9.4 cm.

Step-by-step explanation:

The formula for the volume of a cylinder is V = πr^2h, where V is the volume, r is the radius, and h is the height. We want to find a radius and height that will give us a volume between 475 and 480 cubic centimeters, with a diameter between 8 and 10 centimeters. First, we’ll use the lower limits of the constraints: a volume of 475 cubic centimeters and a diameter of 8 centimeters. The diameter is 8 centimeters, so the radius is 4 centimeters. We can plug in these values to the formula for volume and solve for h: 475 = 3.14 x 4^2 x h 475 = 50.24h h = 9.44 So a possible radius and height for the inside of the cylinder that meets the constraints are: r = 4 cm and h = 9.4 cm.

Answer: 3.45meters

Step-by-step explanation:

To find the range of the length of pipe that the plumber can cut, we need to write an absolute value inequality that expresses the condition that the length of the pipe must be within 0.09 meters of the required length. Let's call the required length L.

The plumber can cut a pipe that is within 0.09 meters of the required length, so the length of the pipe must be between L - 0.09 and L + 0.09. We can express this as:

|3.36 - L| ≤ 0.09

To solve this inequality, we need to consider two cases: when 3.36 - L is positive and when it is negative.

Case 1: 3.36 - L ≥ 0

In this case, the absolute value of 3.36 - L is equal to 3.36 - L. So we can write:

3.36 - L ≤ 0.09

Solving for L, we get:

L ≥ 3.36 - 0.09

L ≥ 3.27

Therefore, if 3.36 - L is positive, the length of the pipe must be greater than or equal to 3.27 meters.

Case 2: 3.36 - L < 0

In this case, the absolute value of 3.36 - L is equal to -(3.36 - L), or L - 3.36. So we can write:

L - 3.36 ≤ 0.09

Solving for L, we get:

L ≤ 3.36 + 0.09

L ≤ 3.45

Therefore, if 3.36 - L is negative, the length of the pipe must be less than or equal to 3.45 meters.

Putting these two cases together, we get:

3.27 ≤ L ≤ 3.45

Therefore, the range of the length of pipe that the plumber can cut is between 3.27 meters and 3.45 meters.

Answer:

To find the solution of the system of equation.

The intersection point is the solution of the system of equation in the graph.

(2,7) is the solution of the given system of equation.

The answer is, option A The solution is (2, 7) because the solution to the system must satisfy both equations simultaneously

Answer:

D

Step-by-step explanation:

given a parabola in standard form

y = ax² + bx + c ( a ≠ 0 )

then the x- coordinate of the turning point ( vertex ) is

[tex]x_{vertex}[/tex] = - [tex]\frac{b}{2a}[/tex]

y = 2x² + 4x - 3 ← is in standard form

with a = 2, b = 4 , then

[tex]x_{vertex}[/tex] = - [tex]\frac{4}{2(2)}[/tex] = - [tex]\frac{4}{4}[/tex] = - 1

substitute x = - 1 into the equation for corresponding y- coordinate

y = 2(- 1)² + 4(- 1) - 3 = 2(1) - 4 - 3 = 2 - 7 = - 5

turning point = (- 1, - 5 )

Answer:

The Correct answer is D

(-1,-5)

Answer:

(x - 4)² + (y + 3)² = 4

Remember the circle formula:

(x - h)² + (y - k)² = r²

h = X center point  

k = Y center point

In this case your center point is (4,-3) and your radius is 2

If u plug everything in and simplify you should get this:

(x - 4)² + (y - (-3))² = 2²

(x - 4)² + (y + 3)² = 4

Friday's practice session was 3 and 153/896 hours longer than

To find out how much longer Friday's practice session was than Wednesday's, we need to subtract Wednesday's practice time from Friday's practice time.

Friday's practice time is 2 3/7 hours. To make it easier to subtract, we can convert this mixed number to an improper fraction:

2 3/7 = (2 × 7 + 3) / 7 = 17/7

Now we can add this to Wednesday's practice time, which is already in improper fraction form:

1 1/8 = (1 × 8 + 1) / 8 = 9/8

Adding these two fractions, we get:

17/7 + 9/8

To add these fractions, we need to find a common denominator. The smallest number that both 7 and 8 divide into is 56, so we can convert both fractions to have 56 as the denominator:

17/7 × 8/8 = 136/56

9/8 × 7/7 = 63/56

Now we can add the numerators:

136/56 + 63/56 = 199/56

This is the total practice time for both Wednesday and Friday. To find out how much longer Friday's practice session was than Wednesday's, we need to subtract Wednesday's practice time from this total:

199/56 - 9/8

To subtract fractions, we need to find a common denominator again:

199/56 - 9/8 = (199/56) × (8/8) - (9/8) × (7/7) = 1425/448 - 63/56

Now we can subtract the numerators:

1425/448 - 63/56 = 2841/896

This is the difference between Friday's practice time and Wednesday's practice time, expressed as an improper fraction. To convert this back to a mixed number, we can divide the numerator by the denominator:

2841 ÷ 896 = 3 with a remainder of 153

So the answer is Friday's practice session was 3 and 153/896 hours longer than Wednesday's practice session.

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The length of each side is 2√6 cm.

We have,

Length of diagonal of square = 4√3 cm

Now, To compute the length of a side of a square Divide d by √2.

So, length of each side

= 4√3 / √2

= 4√6/ 2

= 2√6

Thus, the length of each side is 2√6 cm.

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The small two above the radical symbol indicates that the square root of a mathematical number or expression is being taken, which means that the number under the radical must be squared to obtain the original number

Therefore,the correct answer is True.

An expression is a mathematical phrase that combines numbers, variables, and operations to create a value. It can include arithmetic, algebraic, or trigonometric operations and may contain parentheses, exponents, or radicals.

The square root of a number is a value that, when multiplied by itself, gives the original number. It is denoted by the symbol √ and is a type of radical.

According to the given information:

The correct answer is True.

The radical symbol, which looks like a division bar with a dot on top, is used to denote a root operation in mathematics. The index or degree of the root indicates the number of times the root must be multiplied by itself to obtain the number under the radical. In the case of the square root, the index is 2, which means that the number under the radical must be squared to obtain the original number.

Therefore, when the radical symbol has a small two above it, it is indicating that the square root of the number or expression below the radical is being calculated. The result of the square root operation is always a positive number, since the negative sign is indicated separately outside the radical symbol.

For example, the square root of 25 is written as √25 = 5, since 5 squared is equal to 25. Similarly, the square root of 4 is written as √4 = 2, since 2 squared is equal to 4.

In summary, the small two above the radical symbol indicates that the square root of a mathematical number or expression is being taken, which means that the number under the radical must be squared to obtain the original number.

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The way that data sets can be used to compare two data

When attempting to compare two sets of data, there are numerous ways one can utilize visual representations to help recognize similarities and variances between the two. Here are some common examples:

Measures of center: Data displays such as box plots or histograms can be employed to quickly display measures of central tendency – like the mean, median, and mode – then contrast them amongst the two datasets.

Measures of variability: To compare two collections of data in terms of their measures of variability – including range, interquartile range, and standard deviation

Trends: Scatterplots or line graphs can be used to discern trends among the data and observe distinguishing characteristics between the two sets.

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However, each beaker would have the following if there were, say, five beakers: 2.5 units of water are equal to 8.5/5.

Typically, it is expressed in geometric units, which including cubic metres (m3), cubic centimetres (cm3), or cubic feet (ft3), depending on the length unit being used. A formula that is based on an object's shape can be used to determine its volume. The volume of such a rectangular prism, for instance, can be determined by utilizing the formula V = lwh, where l stands for length, w for width, and h for height. A cylinder's volume can be calculated using the formula V = r2h, where r denotes the circle of the base and h the height.

given

We can simply sum the numbers supplied to determine the total volume of water in all the beakers:

1/4 x 6 + 3/4 x 2 + 1/2 + 1 1/4 + 1 1/2 + 1 3/4

= 1.5 + 1.5 + 0.5 + 1.25 + 1.5 + 1.75 (converting mixed values to improper fractions)

= 8.5

8.5 units of water are therefore present in all of the beakers.

Each beaker will have 8.5 divided by the number of beakers if this water is distributed equally among them.

We are unable to provide a precise response since we are unsure of the number of beakers.

However, each beaker would have the following if there were, say, five beakers: 2.5 units of water are equal to 8.5/5.

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Using the calculus rule, we can rewrite the total derivative (dx/dz) at constant y as the sum of two partial derivatives.

The total derivative (dx/dz) at constant y can be rewritten as the sum of two partial derivatives:
(dx/dz) = (∂x/∂y)*(∂y/∂z) + (∂x/∂z) at constant y

Apply the chain rule
The chain rule in calculus allows us to find the derivative of a function with respect to another variable, by considering how the intermediate variables change.

In this case, we want to find (dx/dz) at constant y.

The chain rule states:
(dx/dz) = (dx/dy)*(dy/dz) + (dx/dz) at constant y
Identify the partial derivatives:
Since we want to rewrite (dx/dz) as a sum of two partial derivatives, we will keep the terms (dx/dy) and (dy/dz) as partial derivatives:
(dx/dz) = (∂x/∂y)*(∂y/∂z) + (∂x/∂z) at constant y
Final answer
The total derivative (dx/dz) at constant y can be rewritten as the sum of two partial derivatives:
(dx/dz) = (∂x/∂y)*(∂y/∂z) + (∂x/∂z) at constant y.

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The coordinates for the dilated figure would be A'(-2, 2), B'(-2, -1), C'(2, -1), and D'(2, 2).

The kind of dilation that was done is called a reduction.

When you dilate a figure with a scale factor k = 1/3, you are performing a reduction, because the scale factor is between 0 and 1. In this case, the dilation will shrink the original figure by a factor of 1/3.

To find the coordinates of the dilated points, multiply the x and y coordinates of each point by the scale factor (1/3):

A' = (-6 x 1/3, 6 x 1/3) = (-2, 2)

B' = (-6 x 1/3, -3 x 1/3) = (-2, -1)

C' = (6 x 1/3, -3 x 1/3) = (2, -1)

D' = (6 x 1/3, 6 x 1/3) = (2, 2)

The coordinates of the dilated figure are A'(-2, 2), B'(-2, -1), C'(2, -1), and D'(2, 2). This type of dilation is a reduction, as the figure becomes smaller.

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If owner asks you to change the method of estimating bad debts to a flat 3% of receivables, then you should carefully "evaluate request to change method of estimating bad-debts", "use prudent and analytical approach" and to communicate effectively with stake-holders.

As a "financial-advisor" for company, it is important to consider request of owner to change method of estimating "bad-debts" to a flat 3% of receivables, given the circumstances described.

(i) It is crucial to understand the reasons behind change in method of estimating bad debts.

In this case, the company is facing a "cash-crunch" and needs to borrow money from the bank, using accounts receivable as collateral.

The owner is aware that many of "accounts-receivable" are more than 90 days past-due, which results in net receivables equal to only 80% of total receivables,

It indicates that company is experiencing a higher level of delinquency in its accounts receivable, and the owner may be seeking a more conservative estimate of bad debts to reflect this situation.

(ii) A more prudent approach would be to conduct a thorough analysis of the company's accounts receivable, considering factors such as the aging of accounts, historical collection patterns, industry norms, economic conditions, and creditworthiness of customers.

This help in developing a more accurate and reliable estimate of bad debts that aligns with the company's specific circumstances.

(iii) it is important to communicate-effectively with owner and other relevant stakeholders, explaining reasons behind recommended method of estimating bad debts and the potential implications of using a flat percentage.

This can help in building transparency, trust, and confidence in the financial reporting process and decision-making of the company.

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Answer:

(- 2, 16 )

Step-by-step explanation:

y = 8x + 32 → (1)

y = - 8x → (2)

substitute y = 8x + 32 into (2)

8x + 32 = - 8x ( add 8x to both sides )

16x + 32 = 0 ( subtract 32 from both sides )

16x = - 32 ( divide both sides by 16 )

x = - 2

substitute x = - 2 into either of the 2 equations and evaluate for y

substituting into (2)

y = - 8(- 2) = 16

solution is (- 2, 16 )

The graph of the linear equation is on the image at the end.,

To graph a line, we need to find two points on the line and then connect them with a line.

Evaluating in x = 0 we will get.

y = (-2/5)*0 - 2 = -2

evaluating in x = 5

y = (-2/5)*5 - 2 = -4

Then we have the points (0, -2) and (5, -4)

And the graph of the linear equation can be seen in the image at the end.

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Using trigonometric functions, we can find the value of w to be = 9.688cm.

The right triangle's angle serves as the domain input value for the six fundamental trigonometric operations, which return a range of numbers as their output. The angle, expressed in degrees or radians, is the domain of the trigonometric function of f(x) = sin, also referred to as the "trig function," and its range is [-1, 1]. In terms of their domain and scope, the other functions are comparable. Algebra, geometry, and calculus all make extensive use of trigonometric functions.

Here in the question,

We have a right-angled triangle.

Basse of the triangle = 8√3cm.

It's an isosceles triangle.

So, cos45° = w/8√3

⇒ 0.70 = w/8√3

Cross multiplying:

⇒ w = 0.70 × 8√3

⇒ w = 9.688 cm.

Therefore, the measure of the length of the side w = 9.688cm.

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18x9=162

18 cubes and 9 layers of the 18 cubes. so thats just eighteen, nine times.

The evaluated probability for chances of  randomly selecting an employee who will  have a starting salary of at least $31,000 is 11.51%. Here, we have to depend on the principles of standard normal distribution to find the percentage of probability,


Let us take  z-score for a starting salary of $31,000 as

z = (31000 - 25000) / 5000
= 1.2

Now after using a standard normal distribution table , the probability of a z-score of 1.2 or greater is approximately 0.1151
Converting it into percentage
0.1151 x 100
= 11.51%
The evaluated probability for chances of  randomly selecting an employee who will  have a starting salary of at least $31,000 is 11.51%.

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Thus, the value of x for the given set of similar triangles is found as: x = 42.

Triangles that are similar to one another in terms of shape but not always in terms of size.

Identical triangles always have congruent corresponding angles and proportional corresponding sides. Two angles must share the same measure in order to be congruent.

The triangles both have proportional equivalent sides. Hence, each pair of corresponding sides' ratios is the same. The scale factor is the name of this ratio.

In smaller triangle. applying angle sum property :

Let the unknown angle be y

y + 126 + 16 = 180

y = 180 - 142

y = 38

For the given similar triangles:

The corresponding angles are also equal.

So,

on the straight line:

16 + 3x + 38 = 180 (linear pair)

3x = 180 - 54

x = 126/3

x = 42

Thus, the value of x for the given set of similar triangles is found as: x = 42.

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The spread of the data in the histogram is uneven or skewed to the right.

A histogram is a graphical representation of data used to display the distribution of values in a dataset, showing data in bins or intervals along the horizontal axis.

The data distribution in the histogram is uneven or tilted to the right. This suggests that there are fewer students who have gone water skiing less frequently (1 to 5 trips) and more students who have gone water skiing more frequently (11 to 15 trips). The frequency is greatest between 11 and 15 visits, which is reflected by the largest bar in the histogram.

In given problem, the skewed distribution of the given data shows that there are more no. of the students doing water-skiing regularly than those who are doing it less frequently.

This might imply that there is a group of students who are more experienced or enthusiastic about water skiing, and they have gone on more excursions than other students who have gone on less trips. It also implies that the majority of students fall within the 11 to 15 trip period, which might imply a common pattern or trend in the data.

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The best description of the spread of the data is that it is skewed or unevenly distributed.

A histogram is a graphical representation of data used to display the distribution of values in a dataset, showing data in bins or intervals along the horizontal axis.

Based on the given histogram, the data is not evenly distributed across the five intervals. The majority of students have been water-skiing between 11 and 15 times, with a frequency of 5. There are fewer students who have been water-skiing between 16 and 20 times, with a frequency of 4, and even fewer students who have been water-skiing between 21 and 25 times, with a frequency of 3.

The spread of the data refers to how far apart the values in the dataset are from each other. In this case, the data is not evenly spread across the different intervals. The values in the dataset are more concentrated in the interval of 11 to 15, and less concentrated in the intervals of 1 to 5 and 21 to 25. This indicates that the majority of students have been water-skiing a similar number of times, while fewer students have been water-skiing either a lot or a little.

Therefore, the best description of the spread of the data is that it is skewed or unevenly distributed.

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The complete question is:

A group of students was asked about the number of times they had been water-skiing. The data is shown in the histogram.

A histogram titled Water Skiing Trips. The x-axis is labeled Number of Times Water Skiing and has intervals of 1 to 5, 6 to 10, 11 to 15, 16 to 20, and 21 to 25. The y-axis is labeled Frequency and starts at 0 with tick marks every 1 units up to 6. There is a shaded bar for 1 to 5 that stops at 1, for 6 to 10 that stops at 2, for 11 to 15 that stops at 5, for 16 to 20 that stops at 4, and for 21 to 25 that stops at 3.

Which of the following best describes the spread of the data? Explain its meaning in this situation?

If man travels "3-miles", turns left ,travel "6-miles", then turn left again travels "8-miles", then he is "7.8-miles" away from the starting point, No option is correct.

The man travel 3 miles straight, so we let the "starting-point" be (0,0),

So, the point after travelling 3 miles straight will be (0,3),

Next, he turns left and travels 6 miles(now facing downwards),

So, the coordinate becomes (6,3);

Next, he Turns left again(now facing right) and travels "8 miles" to the right .

So, the final-coordinate becomes (6, -5).

Now, we calculate the distance between the final point (6, -5) and the starting point (0,0) using the distance formula, which is the square root of the sum of squares of differences in "x" and "y" coordinates:

So, Distance = √((6-0)² + (-5-0)²),

⇒ Distance = √(36 + 25),

⇒ Distance = √61 ≈ 7.8 miles.

Therefore, The distance is approximately 7.81 miles, which is not present in any of the option, So, no option is correct.

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The maximum height achieved by the rider is given by the equation above. You can calculate this value using the given measurements and plug them into the equation to find the maximum height.

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data. It involves the use of methods and techniques to gather, summarize, and draw conclusions from data.

A. The two quantities you would measure for x and y are the time and height, respectively.

B. The equation that relates time and height for an object in projectile motion is given by:

y = y0 + v0y * t - (1/2) * g * t²

where:

y = vertical height at any time t

y0 = initial vertical height (in this case, the height of the ramp)

v0y = initial vertical velocity (in this case, the vertical velocity of the rider at the top of the ramp)

g = acceleration due to gravity (approx. 9.81 m/s²)

t = time elapsed since the rider left the ramp

To apply this equation to the given image, you can put the picture on a grid with the x-axis representing time and the y-axis representing height.

C. To find the maximum height, you need to determine the point at which the rider's height is greatest. From the plotted points, you can see that the maximum height occurs at the point where the curve reaches its apex. You can find this point by calculating the time at which the vertical velocity of the rider becomes zero (i.e., the highest point of the jump). This occurs at the peak of the curve, where the vertical velocity changes from positive to negative. To calculate this time, you can use the equation for vertical velocity in projectile motion:

v = v0y - g * t

where:

v = vertical velocity at any time t

v0y = initial vertical velocity (in this case, the vertical velocity of the rider at the top of the ramp)

g = acceleration due to gravity (approx. 9.81 m/s²)

t = time elapsed since the rider left the ramp

At the peak of the jump, the vertical velocity becomes zero, so we can set v = 0 and solve for t:

0 = v0y - g * t

t = v0y / g

Substituting this value of t into the equation for height, we can find the maximum height:

y = y0 + v0y * (v0y / g) - (1/2) * g * (v0y / g)²

y = y0 + (v0y² / 2g)

Therefore, the maximum height achieved by the rider is given by the equation above. You can calculate this value using the given measurements and plug them into the equation to find the maximum height.

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Once we have found the vertex, we can determine the maximum height achieved by the rider.

What is statistics?

Statistics is a branch of mathematics that deals with the collection, analysis, interpretation, presentation, and organization of numerical data. It involves the use of methods and techniques to gather, summarize, and draw conclusions from data.

To find the highest point the rider achieved on a jump, we need to measure the rider's height at different points during the jump.

A. The two quantities we would measure for x and y would be:

x: the horizontal distance the rider travels during the jump

y: the vertical height of the rider at different points during the jump

B. The equation that describes the rider's motion during the jump would be a quadratic equation in the form of:

y = ax² + bx + c

Where:

a is the coefficient of the quadratic term and represents the acceleration due to gravity

b is the coefficient of the linear term and represents the initial velocity of the rider

c is the constant term and represents the initial height of the rider

C. To find the maximum height, we need to find the vertex of the parabola that represents the rider's motion.

The vertex is the highest point on the parabola and is located at the point (-b/2a, c - b²/4a).

To find the vertex, we need to measure the rider's height at least two different points during the jump.

The two points should be on either side of the vertex to ensure that we have captured the shape of the parabola correctly.

hence, Once we have measured the rider's height at these two points, we can plug the values into the equation and solve for the vertex. Once we have found the vertex, we can determine the maximum height achieved by the rider.

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Answer:

[tex]0.42[/tex]÷[tex]7[/tex]

Step-by-step explanation:

First, let's count the number of colored squares in the hundredth-grid.

There are a total of 42 hundredth-squares.

Since this is measured in hundredths, the number it represents is 0.42.

Each of the different colors represents a separate group that 0.42 is being divided into. There are 7 separate groups.

Since 0.42 is being divided into 7 groups, the equation that is being represented is:

[tex]0.42[/tex]÷[tex]7[/tex]

Answer:

500 ≥ 245.50

500 - 245.50 ≥ 0

254.50 ≥ 0

Therefore, she needs to deposit at least $245.50 to avoid a fee.

Step-by-step explanation:

Let x be the least amount of money she needs to deposit to avoid a fee.

The balance in her checking account after writing the check would be (500 - 245.50) = 254.50.

To avoid a fee, the balance must be greater than or equal to 500, so we can write the inequality as:

x + 254.50 ≥ 500

Solving for x, we get:

x ≥ 500 - 254.50

x ≥ 245.50

The function has a minimum value of -2 that occurrs at x = -1

Given that

g(x) = 2x^2 + 4x

This is a quadratic function with a positive leading coefficient (2), which means that it opens upward and so it has a minimum value.

We can find the vertex of the parabola (the point where it changes direction) by using the formula:

x = -b/2a

where a and b are the coefficients of the quadratic function.

In this case, a = 2 and b = 4, so:

x = -4/(2*2) = -1

To find the corresponding y-value (the minimum value of the function), we substitute x = -1 into the function:

g(-1) = 2(-1)^2 + 4(-1) = -2

Therefore, the minimum of the parabola is at the point (-1, -2).

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Answer:

Any linear equation with a slope of 1.5

(examples:

Step-by-step explanation:

If two equations are parallel, their slopes are the same.

y=1.5x-6 is written in slope-intercept form, which is:

[tex]y=mx+b[/tex]

Where m is the slope, and b is the y-coordinate of the y-intercept.

Thus, looking at the equation y=1.5x-6, we can find that m=1.5.

This means that the slope is 1.5.

Think of any equation in this format that uses 1.5 as the slope. Here are a few examples:

The graphs of all of these equations are parallel to the graph of y=1.5x-6 because their slopes are the same.

You can write your own equation using a slope of 1.5.

Thus, the probability that this song will be played on no more than two out of every four days is 35.60%.

Combination as well as permutation are two alternative strategies in mathematics to divide up a collection of components into subsets. The subset's components can be listed in whatsoever order when combined. The components of the subset usually listed in a permutation in a certain order.

Since this is a combination issue, we must first determine the combination of 4 select 2, and then multiply that result by the chance of each possible outcome:

Choose 2 from a combination of 4:

C(4, 2) = 4! / (2! * 2!) = 4*3/2 = 6

This figure indicates that there are 6 alternative ways that the 2 days we want to be allocated in the 4 days could be used.

The probability of every event is now:

2 days of song playback: (0.58)²

The song wasn't played for two days: (0.42)².

Hence, the final probability is

P = C(4,2) * (0.58)² * (0.42)²

P = 6 * (0.58)² * (0.42)²

P = 0.3560

Thus, the probability that this particular song will be played on no more than two out of every four days is 35.60%.

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angle 1 = 90-( angle 2 ) and angle 2 = 90-( angle 1) ( diagonal property of rectangle)

A diagonal of a rectangle divides it into two congruent right triangles. The diagonals of a rectangle are the same length.

If the diagonal of a rectangle diveds it into two congruent triangles, then triangle OST is congruent to Triangle QRT.

Therefore angle 1 = 90-angl2

represent angle 1 by x and angle 2 by y

therefore x = 90-y

and y = 90-x

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