I NEED HELP WITH STATISTICS

Solving the given matrix operation gives us the solution as: y = -1.4

From the matrix expression given, we can say that the simultaneous equations it represents are:

x - 4y = 8

3x - 2y = 10

We are told to Multiply eq 1 by -3 and add to row 2 and this means we have:

eq 3: -3x + 12y = -24

Adding to row 2 gives us:

10y = -14

y = -1.4

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Answer:

A is incorrect because points are: (length [x], height [y])

B is correct because a point is not a size, it is a position, and they have no dimensions, as they are a dot.

C is incorrect, as I explained above.

D is incorrect, also as I explained above.

Select the bolded answers, as the question asks which are false

Imma get that brainliest ;)

Answer:

It's has to be D) because it says it depends on their dimensions.

Step-by-step explanation:

a) says they have no length or high which is almost the same thing as B).

Cuz B) they have no size or dimension

which that means that if you have to check if they all apply they all have to be the same thing in different words.

C) says their size variety which variety means it could be different types it could be without dimension it could be tall or etc

And D) says their size depends on their dimension all the others say don't have size or dimension. I hope this helps you

Answer:

Triangle P has been rotated clockwise by 90° about the point (0,0).

PLEASE MARK IT THE BRAINLIEST!!!!

a) Approximately 84% of the people are at least 26.5 years old. So, about 3528 people (0.84 * 4200).

b) Approximately 16% of the people are less than 26.5 years old. So, about 672 people (0.16 * 4200).

a) 26.5 years is 1.5 years (18 months) less than the mean (28 years). This is 1 standard deviation (18 months) below the mean.

The 68-95-99.7 Rule states that 68% of the data falls within 1 standard deviation of the mean. So, 100% - 68% = 32% is outside 1 standard deviation.

Since it's symmetrical, one-half of that 32% (16%) is less than 26.5 years, and the other half (16%) is older than 29.5 years.

Consequently, 100% - 16% = 84% is over 26.5 years old. If you multiply 0.84 by 4200, you get 3528 people.

b) As calculated earlier, 16% of the people are less than 26.5 years old. 0.16 * 4200 = 672 people.

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Answer: √2/2

Step-by-step explanation: Starting from the positive x-axis (angle 0), we rotate the ray counterclockwise by 45 degrees, or π/4 radians. Since the point on the unit circle corresponding to 45 degrees lies on the line y = x, its coordinates are (cos(45), sin(45)) = (√2/2, √2/2).

The percentage increase in the number of water bottles from February to April is 19%.

A company manufactures water bottles. The list describes the amount of water bottles manufactured in three months.

Therefore,

Therefore,

Number of water bottles in march = 4100 + 7% of 4100

Number of water bottles in march =4100 + 7 / 100 × 4100

Number of water bottles in march = 4100 + 287

Number of water bottles in march =  4387

Hence,

Number of water bottles manufactured in April = 4387 + 500 = 4887

Therefore,

percentage increase from February to April = 4887 - 4100 / 4100 × 100

percentage increase from February to April = 787 / 4100 × 100

percentage increase from February to April = 78700 / 4100

percentage increase from February to April = 19.1951219512

percentage increase from February to April = 19%

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After 4 years, the investment of $700 at 4% compounded daily results in a future value of $821.45.

The future value represents the present value or investment compounded at an interest rate periodically for a certain number of years.

The future value can be determined using the FV formula or an online finance calculator.

N (# of periods) = 1,460 days (4 years x 365)

I/Y (Interest per year) = 4%

PV (Present Value) = $700

PMT (Periodic Payment) = $0

Results:

Future Value (FV) = $821.45

Total Interest = $121.45

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We would make the bar for the 15-18 age range with a height of 25 on the y-axis of the histogram.

A histogram is a type of chart used to represent the distribution of a set of continuous numerical data. It is a graphical representation that consists of a series of vertical bars, where the height of each bar represents the frequency or count of observations falling within a specific interval or "bin" of values.

To make a histogram, we need to plot the age groups on the x-axis and the corresponding number of tickets on the y-axis. The bars in the histogram should represent the frequency of each age group.

From the given data, the number of tickets bought by people of age 15-18 is 25. Therefore, we would make the bar for the 15-18 age range with a height of 25 on the y-axis of the histogram.

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To decide how the whole could look, I used the information given in the statement that Angela drew a square representing 2/2 of a whole. This tells me that Angela's square represents the entire whole.

If Angela drew a square that shows 2/2 of a whole, it means that the square represents the entire whole.

To show how the whole could look, we can draw a larger square around Angela's square. This larger square would represent the whole, and Angela's square would be a part of it.

Based on this information, I determined that the whole could be represented by a larger square that encompasses Angela's square. The size of the larger square would be such that the area of Angela's square is equal to 1 whole unit, since Angela's square represents 2/2 or 1 whole unit of the whole.

Therefore, I drew a larger square that has the same area as 1 unit and enclosed Angela's square within it. This larger square represents the entire whole, and Angela's square is a part of it. (Image attached)

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The statement "1+1 is the hardest problem in the world" is generally meant to be taken as a joke or a humorous exaggeration.

The phrase may be used ironically to emphasize the difficulty of a seemingly simple task or to highlight the importance of attention to detail. For example, a complex mathematical proof may require multiple steps and involve intricate calculations, but the simplest mistake, such as an error in basic arithmetic, could render the entire proof invalid.

In this context, the phrase "1+1 is the hardest problem in the world" could be used to underscore the importance of checking and double-checking even the most basic assumptions and calculations in complex problem-solving.

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Answer:

D. its a two dimensional object

Answer:

A. It is a polygon

C. It is a one-dimensional object

The shape is a polygon in two dimensions since a polygon must have at least three straight sides.

Answer:

The graph will be a circle with center (0, 2) and radius 6.

Answer:

number 1111q

Step-by-step explanation:

the answer is 1

The solution of the given system of equations is (1, 2.5)

From the graph attached, it van be seen that two intersecting lines represent the system of equations.

And the solution of the system of equations is a common point where these lines intersect.

The graph shows both the line are intersecting each other at (1, 2.5).

Therefore, the solution of the given system of equations will be (1, 2.5).

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Therefore, the slope of line s is equal to (d + b) / (a - c).

In mathematics, the slope is a measure of the steepness of a line. It is defined as the ratio of the vertical change (rise) between two points on the line to the horizontal change (run) between those same two points. In other words, the slope is the change in the y-coordinate divided by the change in the x-coordinate. If the slope is positive, the line is increasing from left to right and has an upward direction. If the slope is negative, the line is decreasing from left to right and has a downward direction. If the slope is zero, the line is horizontal. If the slope is undefined, the line is vertical. The concept of slope is important in various fields of mathematics, science, and engineering, as it helps to describe the relationship between two variables and make predictions based on that relationship. It is also used in calculus to find the rate of change of a function, and in geometry to find the equation of a line or the angle between two lines.

Here,

Since line s is parallel to line t, it has the same slope as line t. The slope of a line passing through two points (x₁, y₁) and (x₂, y₂) can be calculated using the formula:

slope = (y₂ - y₁) / (x₂ - x₁)

In this case, the points on line t are (a, -b) and (-c, d), so the slope of line t is:

slope of t = (d - (-b)) / (-c - a)

slope of t = (d + b) / (a - c)

Since line s is parallel to line t, it has the same slope as line t:

slope of s = (d + b) / (a - c)

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Answer:

[tex](6x-2)(8x+4)° \\ = 6x(8x + 4) - 2(8x + 4) \\ = 48x {}^{2} + 24x - 16x - 8 \\ = 48x {}^{2} + 8x - 8 \\ [/tex]

hope it helps

An equation that models the trigonometric graph is:

y = 4 sin 4x

The general form for an equation that models a wave is this:

±a (sin/cos) (2π(x - p)/T)

where:

a is the amplitude

p is the phase shift

T is the period.

The ±ve will turn into +ve if the graph tends to start from the positive direction, and then turns -ve if it the graph tends to start from the negative direction.

The (sin/cos) will definitely become sine if the graph starts at 0 before it is being shifted. Then, it becomes cosine if the graph begins at the amplitude.

In this problem, we see that the graph begins as positive, and then at the amplitude with no phase shift, we see that the ±ve becomes +ve, (sin/cos) becomes sin, and p becomes zero. Plugging in the given values  in the problem, we see that a = 4 and T = π/2.

We see that this equation becomes:

y = 4sin(2πx/(π/2)).

y = 4 sin 4x

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Answer: 25/546 chance

Step-by-step explanation:

total is 15 chocolates.

Five are milk, so chance of getting milk is 1/3. second is dark, so 5/14 chance. Then white, so 5/13 chance

1/3*5/14*5/13=25/546

Answer:

B. AB = CD = sqrt(13); DA = BC = sqrt(17)

This is because in a parallelogram, opposite sides are equal in length. In this statement, AB is equal to CD and DA is equal to BC, so opposite sides are equal. The values of AB, CD, DA, and BC are given as the square root of 13 and the square root of 17, which matches the condition of the statement.

In statement A, all sides are equal in length, which means the shape is a rhombus, not necessarily a parallelogram.

The values of the expression are,

⇒ x₂ = - 9.4

⇒ x₃ = - 9.4 - (e³⁸ + 38 + 1) / (2e³⁸ + 2)

Given that;

Expression is,

e²ˣ = - 2x - 1

Hence, Function is,

⇒ f (x) = e²ˣ + 2x + 1 = 0

⇒ f' (x) = 2e²ˣ + 2

Now, By newton's method;

⇒ x (n + 1) = x (n) - f (x (n)) / f' (x(n))

⇒ x₂ = x₁ - f (x₁) / f' (x₁)

⇒ x₂ = - 5 - (e¹⁰ + 10 + 1)/(2e¹⁰ + 2)

⇒ x₂ = - 5 - (e¹⁰ + 11)/(2e¹⁰ + 2)

⇒ x₂ = - 5 (2.6 + 11) / ( 2 x 2.6 + 2)

⇒ x₂ = - 68 / 7.2

⇒ x₂ = - 9.4

⇒ x (n + 1) = x (n) - f (x (n)) / f' (x(n))

⇒ x₃ = x₂ - f (x₂) / f' (x₂)

⇒ x₃ = - 9.4 - (e³⁸ + 38 + 1) / (2e³⁸ + 2)

Thus, The values of the expression are,

⇒ x₂ = - 9.4

⇒ x₃ = - 9.4 - (e³⁸ + 38 + 1) / (2e³⁸ + 2)

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In A'B'C'D, line segment A'B has a slope of 0 and a length of 5/4

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

A = (1, 4) and B = (6, 4)

The line AB is a horizontal line that passes through the point y = 4

This means that the slope of the segment A'B' is 0

The length is then calculated as

A'B' = difference in the x-coordinate * scale factor

Substitute the known values in the above equation, so, we have the following representation

A'B' = (6 - 1) * 1/4

Evaluate

A'B' = 5/4

Hence, the length A'B' is 5/4

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14 students excel in all three subjects.

Let's use the Principle of Inclusion-Exclusion to solve this problem.

Let A be the set of students excelling in Arts, B be the set of students excelling in Science, and C be the set of students excelling in Mathematics.

|A| = 24, |B| = 16, |C| = 13

|A ∩ B| = 16, |B ∩ C| = 13, |A ∩ C| = 12

Let x be the number of students who excel in all three subjects.

|A ∩ B ∩ C| = x

We are given that 2 students excel in none of the subjects.

So, |A ∪ B ∪ C| = 52 - 2 = 50

Using the Principle of Inclusion-Exclusion:

|A ∪ B ∪ C| = |A| + |B| + |C| - |A ∩ B| - |B ∩ C| - |A ∩ C| + |A ∩ B ∩ C|

Substituting the given values, we get:

50 = 24 + 16 + 13 - 16 - 13 - 12 + x

Solving for x, we get:

50 = 24 - 12 + x

x = 38 - 24

x = 14

So, 14 students excel in all three subjects.

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Answer:

Step-by-step explanation:

The number of bacteria present at 5 hours is 148.413. The Option B is correct.

In exponential growth, a population's growth rate stays the same regardless of population size which makes the population grow faster and faster as it gets larger.

To get number of bacteria present at 5 hours, we need to evaluate the function [tex]f(5) = e^5.[/tex]

Using a calculator, we get:

[tex]f(5) = e^5\\f(5) = 148.413159103\\f(5) = 148.413.[/tex]

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Answer:

Step-by-step explanation:

a

The given slope of the graph is explaining about the swimmer's lap completion throughout the time of 10 minutes.

In the given graph on the x-axis, we can find the time (in minutes) of 10 minutes.

On the y-axis, the graph represents the number of laps the swimmer is completing.

When we observe closely, the slope is giving very important information. At initial time=0, the no. of laps remaining for swimmer is 30. We can show this data clearly as below:

Number of laps remaining----------Time (in minutes)

30 --- 0

27 --- 1

24 --- 2

21 --- 3

18 --- 4

15 --- 5

12 --- 6

9 --- 7

6 --- 8

3 --- 9

0 --- 10

From the above slope data, we can conclude that for every 1 minute of time elapsing, the swimmer is completing 3 laps.  

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If function "h" is one-to-one function which is having values h(-9) = 5, and h(3) = -4, then the inverse statement is (d) h⁻¹(-4) = 3.

We know that the function "h" is a one-to-one function, so, it has an inverse function (h⁻¹). To find the inverse function, we need to exchange  roles of "x" and "y" and solve for y. This gives:

x = h(y)

y = h⁻¹(x)

The given values of function "h" are h(-9) = 5 and h(3) = -4, we find the values of h⁻¹(5) and h⁻¹(-4):

h(-9) = 5

So, h⁻¹(5) = -9 (by exchanging roles of x and y)

and h(3) = -4

So, h⁻¹(-4) = 3 (exchanging the roles of x and y)

The function "h⁻¹(-4) = 3" is represented in option (d).

Therefore, the correct option is (d).

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The correct statements are,

B)It has two faces that are decagons.

C)It has 11 faces.

D)It has 20 edges.

What is decagonal pyramid?

A decagonal pyramid is a solid whose base is a decagon or a ten sided figure, regular or irregular. The surfaces are ten isosceles triangles, in case of a regular decagonal pyramid with all the ten vertices meeting at a point.

Here The decagonal prism is formed by two regular decagons as its bases and 10 squares as its other faces. the top of the decagonal prism is a regular decagon, so is the bottom face.

We know that decagonal pyramid has 11 faces and 20 edges and 11 vertices.

Hence the correct statements are,

B)It has two faces that are decagons.

C)It has 11 faces.

D)It has 20 edges.

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