Help, I am very confused

By using the property of combination, it can be calculated that -

This is a problem of combination.

There are 15 ways to choose the students who will go to the meeting

What is combination?

Combination is the process of selection some objects from a group of items where the order of the selection do not matter

This is a problem of combination

Number of seniors = 6

Number of students will go to the all district meeting = 2

Number of ways to choose the students who will go to the meeting =

                                                                                                       [tex]{6 \choose 2}[/tex]

                                                                                                = [tex]\frac{6!}{(6 - 2)! \times 2!}[/tex]

                                                                                                = 15

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The statement regarding the correlation coefficient (r) that is true is b) "the correlation coefficient describes the direction of the association between two variables."

The correlation coefficient is a measure of the strength and direction of the relationship between two variables. A correlation coefficient of 1 implies a strong positive correlation between the variables, meaning that as one variable increases, the other variable also tends to increase.

A correlation coefficient of -1 implies a strong negative correlation between the variables, meaning that as one variable increases, the other variable tends to decrease. A correlation coefficient of 0 implies no correlation between the variables. The sign of the correlation coefficient (positive or negative) indicates the direction of the association between the variables, while the magnitude of the coefficient (closer to 1 or -1) indicates the strength of the association.

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Solving and graphing of inequality can be done by following rules of simplification and graphing accordingly.

The horizontal straight lines in mathematics known as number lines are where integers are arranged in equal intervals. A number line can be used to represent every number in a sequence. The endpoints of this line go on forever. Integers are arranged on a number line in the image above.

On the number line, find the first number. To add, take as many steps to the right as the second number. Move as far to the right as the second number in order to subtract. The solution is the number you finally select.

When resolving an inequality, you can do one of the following: • Add the same amount to each side; • Subtract the same amount from each side; • Multiply or divide each side by the same positive amount. You must flip the inequality sign if you multiply or divide each side by a negative number.

To represent an inequality on a number line, such as x>3, first draw a circle around the number (e.g., 3). Fill in the circle if the sign also says equal to (). Leave the circle blank if the sign doesn't include equal to (> or <).

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According to question,

Given data,

We know that;

Zero product property,

ab =0

either a or b or both must be zero.

(x-5) (x+7) = 0

Where a=(x-5)

b= (x+7)

then,

x-5=0(both side equation adding +5)

 +5=+5

So,

x = 5

therefore,

x+7=0(both side equation substrate -7)

 -7=-7

So,

x=7

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Answer:

Step-by-step explanation:

Your question asks what is  -[tex]3^{2}[/tex] / 2    but,  since it's on the Unit circle, I know you meant   - [tex]\sqrt{3}[/tex] /2    Also, it's one of those known angles on the unit circle.

note that the angles can all be put in the form of  [tex]\sqrt{x}[/tex] / 2 , where x = 0,1,2,3,4 ,  for the five special points on the unit circle.  

as the attached pic shows,   Cos(t) for the given point would be 180-150°= 30 and sin(t) would be 90 - 30 = 60 °

it's not easy to understand how I got those angles,  just ask if you don't get it.  :)

Students are pushed by reform mathematics curricula to make sense of novel mathematical concepts through investigations and projects, frequently in practical settings.

A point, line, or geometric object can be changed in four different ways that are all collectively referred to as transformations. The pre-image is the shape of the object as it was originally, and the transformed shape of the object is termed the image.

Students are pushed by reform mathematics curricula to make sense of novel mathematical concepts through investigations and projects, frequently in practical settings. Writing and speaking clearly, cooperating in groups, and drawing connections between ideas and representations are all stressed in reform textbooks.

Translation, rotation, reflection, and expansion are the four different types of transformation. Each change must be carried out, and you must be able to tell which transformations have been carried out.

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The approximate wait time for the fastest 4% of passengers is approximately 29.29 minutes.

What is Standard Deviation?

It is a measure of how spread out numbers are. It is the square root of the Variance, and the Variance is the average of the squared differences from the Mean.

To find the approximate wait time for the fastest 4% of passengers, we need to use the normal distribution and the inverse normal distribution function.

The normal distribution is a continuous probability distribution that is symmetrical around the mean, and is defined by the mean and standard deviation. In this case, the mean wait time for passengers with global entry is 40 minutes and the standard deviation is 12 minutes.

The inverse normal distribution function is a mathematical function that takes a probability as input and returns the corresponding value from the normal distribution. In other words, it allows us to find the value that corresponds to a given percentile of the normal distribution.

To find the wait time for the fastest 4% of passengers, we need to find the value that corresponds to the 4th percentile of the normal distribution. To do this, we can use an inverse normal distribution calculator or a normal distribution table.

Plugging in the mean and standard deviation of the wait time and the percentile of 4, we get a value of approximately 29.29 minutes. This is the wait time for the fastest 4% of passengers.

So, The approximate wait time for the fastest 4% of passengers is approximately 29.29 minutes.

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If the polygon has four right angles , then it is a square when all four sides are equal and a rectangle when the opposite sides are equal .

The Polygon is defined as closed object that is made of line segments rather than curves on a 2 - D plane .

A square is defined as a polygon in which all the angles are right angles and pair of opposite sides are equal .

A rectangle is defined as polygon that have all the angles as right angles and all four sides are equal .

From above definitions , we can say that ,

A polygon that has four right angles , is a square when all four sides are equal and it is a rectangle when pair of opposite sides are equal .

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Answer: The mean is less than the median IQ

Step-by-step explanation:

When a distribution is skewed left (there is an obvious tail going in the left direction, which is true in this case), then the mean is drawn down because it is not resistant to any outliers, or unusual data points.

The median, however, is resistant to outliers and will not move as much.

Therefore, the mean will be less than the median.

The relationship between the mean and median of a data set is determined by whether the data is symmetrically distributed, positively skewed, or negatively skewed. However, without a visual representation or specific values, we cannot definitively compare the mean and median of the IQ scores.

In order to determine the relationship between the mean and the median of a data set, we need to know the nature of its distribution. If the data is symmetrically distributed, the mean and the median will be equal. If the data is positively skewed (has a long right tail), the mean will be larger than the median. If the data is negatively skewed (has a long left tail), the mean will be less than the median.

However, in the absence of the actual histogram in your question, the correct answer would be 'It cannot be determined because we cannot tell the exact values of the IQ scores in the sample.' This is because without a visual representation or specific values, we cannot determine the distribution's skewness, and by extension, cannot compare the mean and median.

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Answer: 49/ 16

Step-by-step explanation:

-3.5 or -35/ 10 = - 7/2

-7/8 times -7/2 = 49/ 16

Negative time negative will be positive!

To find horizontal line,its equation is y=b where b is constant.Horizontal line is parallel to x-axis of the coordinate plane.To find vertical ,its equation is x=b where b is constant.Vertical line is parallel to y-axis.

A horizontal line is a line extending from left to right and right to left.The slope of horizontal line is always zero.Horizontal lines are always parallel to x-axis.The y-intercepts of a horizontal line y=b is the point (0,b).

A vertical line is a line extending from up to down and downward to upward.Its never moves left to right.Vertical lines are always parallel to y-axis.The equation of a vertical line is x=a and x=-a where x is the x-coordinate of ant point on the line and a is the point where he line crosses the x-intercepts.

Hence we can find horizontal and vertical lines on the graph or paper easily.

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The denominator of a fraction represents the number of equal parts in a whole, while the numerator represents the number of parts considered.

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The number of two-points and three points shot The Cruisers scored are 24 and 19 points respectively.

The Cruisers scored a total of 105 points in a basketball game. They also had a total of 43 baskets, of which some were two-point shots and some of were three-point shots.

Therefore, the number of two-points and three-points the cruiser scored is as follows:

x = number of two-points

y = number of three-points

So;

x + y = 43 -------1

Also;

2x + 3y = 105 -----2

Multiplying equation(1) by 2

2x + 2y = 86

2x + 3y = 105

Subtract equation(i) from equation(ii)

y = 19

To find x:

x = 43 - 19

x = 24

Therefore,

number of two-points = 24

number of three-points = 19

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Answer:0.5x - y -7.5 = 0

Step-by-step explanation:

Completing the table using equivalent ratios Willka can cover 4.5 m² of the area with 1 - liter paint.

Given :

What are equivalent ratios?

Equivalent ratios are the ratios that express same relation or numbers that are equivalent.

so area covered for 1 paint

13.5 / 3 = 4.5

4.5 for 1 paint

for 10 paint :

Area covered = 4.5 * 10

= 45

Table :

Area covered  ( m^2 )        paint ( L )

13.5                                      3

4.5                                        1

45                                         10

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Answer:

45, 60, 75

Difference between the largest and smallest angles

75 - 40 = 35

Step-by-step explanation:

First solve for x.  The sum of the interior angles of a triangle is 180

3x + 4x + 5x =180  Combine like terms

12x + 180  Divide both sides by 12

[tex]\frac{12x}{12}[/tex] = [tex]\frac{180}{12}[/tex]

x = 15

3x = 3(15) = 45

4x = 4(14) = 60

5x  = 5(15) = 75

Step-by-step explanation:

please, burn this into your brain for life :

the sum of all angles in a triangle is always (yes, no exceptions) 180°.

so,

3x + 4x + 5x = 180

12x = 180

x = 180/12 = 15

3x = 3×15 = 45°

4x = 4×15 = 60°

5x = 5×15 = 75°

the difference between largest and smallest angle is therefore

75 - 45 = 30°

According to good rule of thumb is 250 to 400 square feet per gallon for each coat, and 170 to 200 square feet per gallon for two coats.

It might be challenging to calculate or estimate the precise amount of paint that you will need when painting your home.

Every paint has a spread rate that controls how many square feet may be covered each gallon. A good rule of thumb is 250 to 400 square feet per gallon for each coat, and 170 to 200 square feet per gallon for two coats. Choosing the proper quantity of paint for steel is a tough matter because high-quality paint is expensive and you don't want to overbuy. To avoid overbuying paint, we advise simply purchasing 80% of the projected amount at first and the remaining 20% after you are nearly completed.

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Area in term of height- This method works well with right-angled triangles or in situations where the base as well as height are known:

Area = 1/2 x base x  height

TRIANGLE REGION: Triangles' areas can be determined in three simple ways. Each method works best with a specific kind of triangle.

These techniques:

Lets assume a triangle.

Area is equal to half of a base times a height.

Area = 1/2 x base x  height.

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The equation to form 5 with 4 2s is 2 + 2+ (2/2).

Children can use the acronym BODMAS to help them remember the right order to carry out mathematical operations while solving problems.

The formation of 5 with 4 2s is -

= 2 + 2+ (2/2)

= 2 + 2 + 1

= 5

Thus, the expression to form 5 with 4 2s is 2 + 2+ (2/2).

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The roots of the quadratic equation 4x2 − 7x + 0 are -7/4 and 0.

A quadratic equation is an equation of the form ax2 + bx + c = 0, where a, b, and c are constants and a ≠ 0. Quadratic equations are used to solve problems involving areas, lengths, and other geometric figures, as well as to find unknown values. Such equations are often used in calculus and physics.
To find the roots, you can use the quadratic formula, which is x = -b ± √b2 - 4ac/2a. In this case, a = 4, b = -7, and c = 0, so the roots are -7/4 and 0.
Another way to find the roots is to use the factoring method. To factor 4x2 − 7x + 0, you can factor out 4x and then group the terms to get 4x(x − 7) + 0. Then you can set each factor equal to zero to get x = 0 and x = 7. Therefore, the roots of the equation 4x2 − 7x + 0 are -7/4 and 0.
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The required solution would be h = 3Vr²/3.14 for h, where V is the volume of a cone.

The volume of a cone is defined as the amount of space occupied by a cone in a three-dimensional plane.

The volume of the cone (V ) = 1/3πhr²

We have been given that the volume of a cone is (1/3)3.14r²h

We have to determine the solution for h

As per the given question, we have

⇒ V = (1/3)3.14r²h

Multiply by 3 into the above equation,

⇒ 3V = 3.14r²h

Divided by 3.14 into both sides

⇒ 3V/3.14 = r²h

⇒ h = 3Vr²/3.14

Therefore, the required solution would be h = 3Vr²/3.14.

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Therefore , the 2 year old children can able to count to 1 to 100 counting by making them learn.

The counting-on method can be used by mathematicians to add numbers. With this approach, a student first adds the larger number,

variable then "counts on" with the other addends to arrive at the sum. If the number sentence is 4 + 3, the student will understand that 4 is the greater number and will add three additional numbers, such as the integers "4... 5, 6, 7."

Here,

Every child is different in how they grow and learn, yet many

Children as young as two years old may count past ten and learn their numbers from 1 to 100.

They could be ready to try numbering in fives or using other skip counting strategies (5, 10, 15, 20, and so on).

As soon as you can, begin teaching your child how to recognise

numbers.

As a result, by making the toddlers study, two-year-olds can count to one hundred.

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Answer:

Slope

Angle (degrees) Gradient Grade (%)

Therefore, the correct answer is 5.24

[tex]y=2[/tex] ± [tex]\sqrt{28+4x}[/tex] is the equation that equals 2(x - 2)2 = 8(7 + y).

Addition and subtraction, multiplication, and division are examples of inverse operations, which are pairs of mathematical operations where one operation reverses the effects of the other. In most cases, a number's inverse refers to its reciprocal, or x - 1 = 1 / x. When a number is combined with its reciprocal, or inverse, the result is 1, or 1.

Considering the equation:

[tex]2(x-2)^2=8(7+y)[/tex]

Change the x and y variables.

[tex]2(y-2)^2=8(7+x)[/tex]

In terms of x, solve for y.

We have two sides, therefore divide them by two.

[tex](y-2)^2=4(7+x)[/tex]

Using the distribution property, [tex]a.(b+c)=a.b+a.c[/tex]

[tex](y-2)^2=28+4x[/tex]

Square-rooting both sides yields:

[tex]y-2=[/tex]±[tex]\sqrt{28+4x}[/tex]

our two sides plus two;

[tex]y=2[/tex]±[tex]\sqrt{28+4x}[/tex]

As a result, equation [tex]y=2[/tex]±[tex]\sqrt{28+4x}[/tex] is the opposite of [tex]2(x-2)^2=8(7+y)[/tex]

The complete question is:-

Which equation is the inverse of 2(x – 2)2 = 8(7 + y)?

Options:

–2(x – 2)^2 = –8(7 + y)

y= 1/4 x^2 -x -6

y= -2 +/- sqrt of 28+4x

y= 2 +/- sqrt of 28+4x

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Answer:

y ≈ 76.4°

Step-by-step explanation:

To solve for the angle a trigonometric function is being used on, we have to use the inverse of the trigonometric function.

Inverse of tan(y°) = 4.12:

[tex]tan^-1(4.12) = y[/tex]

Next, I used a scientific calculator to find the angle measure of y.

[tex]76.4 = y[/tex]

The slope to a line perpendicular to y = 3x + 1 is -1/3.

The ratio of how much y grows as x grows by a certain amount is called the slope of a line. A line's slope, or the amount by which y rises as x rises, indicates how steep a line is. Nowhere on the line has a different slope; it is constant. We frequently seek to quantify the steepness in mathematics. The difference between slope A and slopes B and C is obvious. While slope A is just four units high, they both stand at seven. It would therefore seem that steepness and height are related.

Given

Equation

y = 3x + 1

Using slope intercept from,

y = mx + b

m = slope

m = 3

Slope which is perpendicular

= -1/m

= -1/3

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Answer:

0

Step-by-step explanation:

Rise over run.

Difference between y is 0.

Difference between x is 5.

0/5 = 0.

Answer:

m = 0

Step-by-step explanation:

Slope is rise/run or (y2 - y1) / (x2 - x1)

We see the y stay the same, and the x decrease by 5, so the slope is

m = 0/5

The Answer Is 1,837 cm

Answer: 10

Step-by-step explanation:

Because 0.25 or 25%

We take 40 times 0.25 =  10