Which estimated solution is closest to the actual solution shown in the graph?



Question 7 options:

(3,3)


(6,1)


(0,2)


(4,5)


(7,7)


(4,3)


(2,4)

(a) The probability that the individual's pressure will be between 120 and 121.8 mm Hg is 0.1255.

(b) The probability that the sample mean will be between 120 and 121.8 mm Hg is 0.4608.

(c) The probability in part a is so much smaller than the probability in part b since, in part a, the probability is calculated for an individual's pressure whereas, in part b, the probability is calculated for a sample of adults.

The z-score formula in a normal distribution is given by

z = (X - μ)/σ

Here, the mean (μ), standard deviation (σ), and random variable (X) are used for finding the z-score.

With this z-score, from the normal distribution table, we can find the probability of the required random variable.

It is given that,

The mean of the pressure of normal adults is μ = 120 mm of Hg

The standard deviation is σ = 5.6

Consider X is a normally distributed variable.

(a) Then, the probability that the individual's pressure will be between 120 and 121.8 mm Hg is calculated by P(120 < X < 121.8).

Here, the z-scores for the given means are:

z-score for the random variable 120 mm Hg is

z = (X - μ)/σ

⇒ z = (120 - 120)/5.6 = 0

z - score for the random variable 121.8 mm Hg is

z = (X - μ)/σ

⇒ z = (121.8 - 120)/5.6 = 0.32

So, the required probability is

P(120 < X < 121.8) = P(0 < z < 0.32)

⇒ P(z < 3.2) - P(z < 0)

From the normal distribution table, we get P(z < 3.2) = 0.6255 and P(z < 0) = 0.5000.

Then, the probability is

P(z < 3.2) - P(z < 0) = 0.625 - 0.5000 = 0.1255

(b) The sample size n = 30 and the random variables are 120 and 121.8 mm Hg.

Since the distribution is for a sample of adults, the sample mean value is

μₓ = μ = 120 and the sample standard deviation is

σₓ = σ/√n = 5.6/√30 = 1.022

Then, the z-scores for the given random variables are:

z-score for the random variable 120 mm Hg is

z = (X - μₓ)/σₓ = (120 - 120)/1.022 = 0

z-score for the random variable 121.8 mm Hg is

z = (X - μₓ)/σₓ = (121.8 - 120)/1.022 = 1.76

So, the required probability is

P(120 < X < 121.8) = P(0 < z < 1.76)

⇒ P(z < 1.76) - P(z < 0)

From the normal distribution table, we get P(z < 1.76) = 0.9608 and P(z < 0) = 0.5000.

Then, the probability is

P(z < 1.76) - P(z < 0) = 0.9608 - 0.5000 = 0.4608.

(c) The answer to part a is so much smaller than the answer to part b. This is because part a is the distribution for an individual and part b is the distribution for a sample of adults.

So, the sample mean and sample standard deviation will get changed in part b.

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Answer:

176.6

Step-by-step explanation:

You can use sine, cosine, or tangent to find x (the trick is determining which to use).

Looking at the 63° angle, its adjacent side is GH, which has a length of 90. The opposite side of the 63° angle is side FG, which has a length of x. You're going to need a ratio that will give you the opposite side knowing the adjacent.

You can use the... acronym?... SOH-CAH-TOA.

SOH - When using sine (S), you get the ratio of the opposite (O) side to the hypotenuse (H).

CAH - When using cosine (C), you get the ratio of the adjacent (A) side to the hypotenuse (H).

TOA - When using tangent (T), you get the ratio of the opposite (O) side to the adjacent (A) side.

Since we're not using the hypotenuse at all, we need to use tangent, which is the ratio of opposite to adjacent. You can set up the equation:

tan(63°) = x/90

Type this into your calculator (make sure it's in degrees and not radians!) and you get:

1.9626 * 90 = x

x = 176.6

Therefore demand is "decreased by 100 units".

What is predicted value in regression?

Given the values of X, we can predict the values of Y using the regression line. We go directly up to the line for any given value of X, then move horizontally to the left to get the value of Y. The expected value of Y is abbreviated Y' and is known as the predicted value of Y.

[tex]$$\begin{aligned}& \hat{y}=130-20 x \\& \hat{y}=\text { demand of product } \\& x=\text { price of product }\end{aligned}$$[/tex]

Given [tex]$x$[/tex], increased by 5 units

[tex]$$\begin{aligned}& \hat{y}=130-20(x+5)=130-20 x-100 \\& \hat{y}=30-20 x\end{aligned}$$[/tex]

Therefore demand is "decreased by 100 units"

Complete question: Regression analysis was applied between demand for a product (y) and the price of the product (x), and the following estimated regression equation was obtained. ŷ = 130 − 20x Based on the above estimated regression equation, if price is increased by 5 units, then demand is expected to: increase by 100 units. decrease by 20 units. increase by 130 units. decrease by 100 units.

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How would you express the area of he rectangle using the Distributive Property?

area = length * width

area using Distributive Property: 3 (x + 5)

Answer:

2/27 or 0.074 or 7.4%

Step-by-step explanation:

Step 1: Roll a fair 6-sided die 27 times. The following outcomes are obtained. 

roll-

1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27

outcome-

2,2,2,5,6,4,5,3,4,3,2,1,2,1,3,6,6,1,4,3,2,6,3,5,4,2,5

Step 2: Make a table for the frequency of each distinct outcome. 

Outcome-

1,2,3,4,5,6

Frequency:

3,7,5,4,4,4

Step 3:  The probability of rolling a two on the die is obtained using the classical probability formula as follows,

P(X=2)= factorable cases/total cases

from the frequency distribution table,

P(X=2)= 2/27= 0.074=7.4%

4 is the constant of proportionality of given graph.

Graph is a mathematical representation of a network and it describes the relationship between lines and points.

Given,

The graph of the relationships ( dogs,cost) is a line that contains the points(0,0) (3,12) and (6,24).

We need to find the constant of proportionality

The constant of proportionality is the ratio that relates two given values in what is known as a proportional relationship.

To find the constant of proportionality, we have to divide the value of y by x.

12/3=4

24/6=4

Hence, 4 is the constant of proportionality of given graph.

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Answer:

In the professional market there is always professional competition, because there are always different professionals competing or looking for the same jobs.

This has been the market where the demand and supply associated with work or labor elements are concentrated.

In a labor market, as in any other market, there are skills, in this context, job skills, because there are always several professionals looking for the same job offers or opportunities.

¡Hope this helped!

Answer:

32

Step-by-step explanation:

The end of the box is at 32.

Micro middle sold the least no of different types of consoles.

Matrices represent data in the form of rows and columns together as an array form.

From matrix A we get the data as follows,

A row represents shops and columns represents types of console.

Games Go sold (53 + 21 + 48) = 122 different types of consoles.

Better Buy sold (65 + 34 + 70) = 169 different types of consoles.

Micro middle sold (18 + 11 + 15) = 34 different types of consoles.

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Answer:

10

Step-by-step explanation:

Because if you line up the numbers 10 is the least common factor of 110,40,120

Answer: b 10

Step-by-step explanation:

the prime factorization of 110: 2 * 5 * 11

the prime factorization of 40: 2^3 * 5

the prime factorization of 120: 2^3 * 3 * 5

the factor they all share is only 2, and they all share 5 but they dont all share 11 and 3. Multiply 2 * 5 = 10. SO 10 is the GCF (Greatest Common Factor) of 110, 40, and 120.

hope this helps!

A triangle has three angles that measure 80º, 65º, and 35º will lead to infinite number of triangles

When no side is specified, an infinite number of triangles are created.

If side lengths are not given, the three angles will result in an infinite number of triangles that are unique.

The option that provided only angles and no sides, namely angles of 80º, 65º, and 35º are given matches the criterion of formation of unlimited sides of triangle

To build an endless number of triangles, other alternatives have sides or a side is provided but not in accordance with that.

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The height of the new building in the zoo is calculated to be 6.375 m

The problem is solved by using the scale factor to increase or decrease the model.

When the scale factor is less than it leads to decrease but when above  it leads to increasing.

The case in the problem is increasing.

First, they made a model that was 1.7 meters tall

the height of the model = 1.7 m

a more detailed model that was 1.5 times as tall as the first model

the height of the detailed model = 1.7 * 1.5 = 2.55 m

The building will be 2.5 times as tall as the height of the detailed model

= 2.5 * height of the detailed model

= 2.5 * 2.55

= 6.375 m

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The value of the W would be 1.9 kg.

What is the mean of numbers?

The mean (aka the arithmetic mean, different from the geometric mean) of a dataset is the sum of all values divided by the total number of values. It's the most commonly used measure of central tendency and is often referred to as the “average.”

Larry has to deliver 7 parcels.

The mean weight of the 7 parcels is 2.7 kg.

So

           mean = sum of all weights of 7 parcels/7

            2.7 * 7 = sum of all weights of 7 parcels

              Sum of all weights of 7 parcels = 18.9 kg

Now Larry delivers 3 of the parcels each of weight 'W'

now the new weight will be = 18.9 - 3W

Remaining parcels = 7 - 3 = 4

New mean = 3.3

               Now again by using the formula of mean, we get

                          3.3  = (18.9 - 3W)/4

                          18.9 - 3W = 13.2

                           3W = 5.7

                              W = 1.9 kg.

Hence, the value of the W would be 1.9 kg.

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The complete statement will be;

⇒ The product of 7 and 5/8 is 35 / 8 because ​5/8​ is less than 1.

What is Multiplication?

To multiply means to add a number to itself a particular number of times. Multiplication can be viewed as a process of repeated addition.

Given that;

The statement is;

''The product of 7 and 5/8 is Choose... because ​5/8​ is less than 1.''

Now,

Since, The statement is;

''The product of 7 and 5/8 is Choose... because ​5/8​ is less than 1.''

Hence, We get;

⇒ 7 × 5/8 = 35 / 8

Thus, The complete statement will be;

⇒ The product of 7 and 5/8 is 35 / 8 because ​5/8​ is less than 1.

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Slope-intercept form:

y=−9x+44y=-9x+44

Point-slope form:

y−8=−9⋅(x−4)

Comparing the number of same-size bottles drank to the amount of ounces of water consumed. So, option c is correct.

When the ratio of the output to the input stays constant at every given point along the function, the rate of change is said to be constant. A linear function's change will occur at a steady rate.

Comparing the number of same-size bottles drank to the amount of ounces of water consumed.

We say there is a constant rate of change when a quantity varies uniformly in relation to the change of another quantity.

Therefore, there is a constant rate of change if one quantity is directly proportionate to the other.

The number of identical-sized bottles drank is directly proportionate to the number of ounces of water consumed. As a result, the rate of change in water ounces in relation to the quantity of identical-sized bottles is constant. The quantity of the remaining alternatives are not directly proportionate to one another.

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Answer:

24 degree increase

Step-by-step explanation:

If the temperature rises 3 degrees steadily over an eight hour period, the total temperature increase after eight hours would be 3 * 8 = 24 degrees.

Z-score of college student z=0.725

Z-score of university student z=0.664.

The relationship between a value and the mean of a set of values can be quantified using a Z-score. The Z-score is computed using the standard deviations from the mean. A data point's score is equal to the mean score if the Z-score is 0. The standard score is the value of a raw score in statistics that deviates from or exceeds the mean of the phenomenon being observed or assessed. Positive standard ratings are assigned to raw values above the mean, whereas negative standard ratings are assigned to raw values below the mean.

Given,

For the college student,

X₁=$9935

μ₁=$8581

σ₁=$1867

From the university student,

X₂=$11757

μ₂=$10339

σ₂=$2133

z-score of college student=(X₁-μ₁)/σ₁

z=(9935-8581)/1867

z=0.725

z-score of university student=(X₂-μ₂)/σ₂

z=(11757-10339)/2133

z=0.664

Therefore, z-score of college student=0.725

z-score of university student=0.664

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Answer: x-4

Step-by-step explanation:

[tex]\displaystyle\\\frac{x^2-9x+20}{x-5}=\\\\\frac{x^2-5x-4x+20}{x-5} =\\\\\frac{(x^2-5x)-(4x-20)}{x-5} =\\\\\frac{x(x-5)-4(x-5)}{x-5}=\\\\\frac{(x-5)(x-4)}{x-5} =\\\\x-4[/tex]

After solving the equation the complex number 19 + 19i.

What is polar form?

In mathematics, polar form is a way of representing a complex number in terms of its magnitude (the distance from the origin to the point on the complex plane) and its argument (the angle formed by the positive x-axis and the line connecting the origin to the point on the complex plane).

To plot the complex number 19 + 19i on the complex plane, you can represent it as a point with coordinates (19, 19). The complex plane is a two-dimensional coordinate system in which the x-axis represents the real part of a complex number and the y-axis represents the imaginary part.

The complex number 19 + 19i can also be written in polar form and in exponential form.

In polar form, a complex number is represented by its magnitude (the distance from the origin to the point on the complex plane) and its argument (the angle formed by the positive x-axis and the line connecting the origin to the point on the complex plane).

The magnitude of the complex number 19 + 19i is:
magnitude = √(19^2 + 19^2)
= √(361 + 361)
= √(722)
= 27

The argument of the complex number 19 + 19i is:
argument = atan2(19, 19)
= 45°

Therefore, the complex number 19 + 19i can be written in polar form as:
19 + 19i = 27 * cis(45°)

In exponential form, a complex number is represented as the product of its magnitude and the complex exponential cis(θ), where θ is the argument of the complex number.
Therefore, the complex number 19 + 19i
Polar form is usually written as:
r * cis(θ)
where r is the magnitude of the complex number and θ is the argument, expressed in radians.

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The percentage change of the rainfall the meteorologist predict is 55%

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

Predicted amount of rainfall = 1.0 inches

Actual amount of rainfall = 2.2 inches

The percentage change of the rainfall the meteorologist predict is calculated as

Percentage change = (Actual amount of rainfall - Predicted amount of rainfall)/Actual amount of rainfall * 100%

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

Percentage change = (2.2 - 1.0)/2.2 * 100%

Evaluate the difference in the above equation, so, we have the following representation

Percentage change = 1.2/2.2 * 100%

Evaluate

Percentage change = 0.55 * 100%

So, we have

Percentage change = 55%

Hence, the percentage change is 55%

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Answer:

y=5/4x+1

Step-by-step explanation:

slope intercept form is y=mx+b

M- slope

B- y intercept

We already know slope

y=5/4x+b

To find b we fill in the coordinates we know (-8,-9)

-9=5/4(-8)+b

-9=-40/4+b

-9=-10+b

+10 +10

1=b

Now. We fill it in

y=5/4x+1

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The cost for the sheet is $22.60 and a discount of 30% is given.

It is important to note that a percentage is a value or ratio that may be stated as a fraction of 100. If we need to calculate a percentage of a number, we should divide it's entirety and then multiply it by 100.

From the information, the brand of sheets is on sale 30% off with a regular price of $18.00 per sheet.

Therefore, the cost for the sheet will be:

= $18 - (30% × $18)

= $18 - $5.40

= $12.60

The cost for the brand of sheet is $22.60.

Note that the information was incomplete and the calculation was based on the information given.

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The value of f ( 5 ) in the equation f(x) = 3x² + 2x - 1 is f ( 5 ) = 84

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

Let the equation be represented as A

Now , the value of A is

f(x) = 3x² + 2x - 1

Now , to calculate the value of f ( 5 ) , substitute the value of x as 5

So , when x = 5 , the equation will be

f(x) = 3x² + 2x - 1

f ( 5 ) = 3 ( 5 )² + 2 ( 5 ) - 1

On simplifying the equation , we get

The value of f ( 5 ) = 3 x 25 + 10 - 1

The value of f ( 5 ) = 75 + 10 - 1

The value of f ( 5 ) = 85 - 1

The value of f ( 5 ) = 84

Therefore , the value of f ( 5 ) is 84

Hence , The value of f ( 5 ) in the equation f(x) = 3x² + 2x - 1 is f ( 5 ) = 84

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Answer:

-16

Step-by-step explanation:

Replace the x values with 7.

The dependent variable, y from the given situation is 15

The total number of exercises the individual needs, y = 3x/3

Where,

So,

y = 3x/3

substitute the value of x into the equation

y = 3(15) / 3

open parenthesis

y = 45 /3

y = 15

In conclusion, the value of the dependent variable is 15

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By using the concept of compounded interest, it can be calculated that

$9549.02 has to be invested  at 4.3% interest compounded continuously to have $19,000 after 16 years

First option is correct

What is compound interest?

If the interest on a certain principal at a certain rate over a certain period of time increases exponentially rather than linearly, the interest earned is called compound interest.

Let the principal be $p

Rate= 4.3 %

Time = 16 years

[tex]19000 = pe^{\frac{4.3}{100} \times 16}\\19000 = pe^{0.688}\\19000 = p \times 1.989732\\p = \frac{19000}{1.989732}\\[/tex]

p = $9549.02

First option is correct

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