Please help me I don’t get it

Answer:

hello\\

Step-by-step explanation:

Using the concepts of statistics, we got that at least 79 is the minimum size of the sample needed in order to have a margin of error of two minutes or less, when we need to construct a 95% confidence interval for the mean length of time.

We have mean as  357.9minutes and standard deviation as 20.18 minutes.

To have the margin error 2 minutes or less than it we need to take

Z-score of the given sample distribution which is given by:

                Z=(X-μ)/σ

Here ,μ=357.9,σ=20.18,X=?,Z=95/100

=>95/100=(X-357.9)/20.18

=> -0.95×20.18=X-357.9

=>X=-357.9+0.95×20.18

=>X=-357.9+19.171

>X=-338.729

When X=-338.729,the p score is around 79.

Hence, when I want to construct a 95% confidence interval for the mean length of time of the flight in 2018 based on a sample of flights in 2018., the minimum size of the sample needed in order to have a margin of error of two minutes or less is 79.

To know more about  statistics, visit here:

https://brainly.com/question/23091366

#SPJ4

Answer:

5/8 - 1/4 = 3/8

Step-by-step explanation:

1 x 2 = 2, 4 x 2 = 8, so we're left with 2/8

Answer:

3/8

Step-by-step explanation:

5/8 - 1/4

to be able to compare fractions or add/subtract them directly, we need to bring them all to the same denominator (the bottom part of the fractions).

it is usually easier to bring the smaller to a larger number than the other way around, because of the existing numerators (the top part of a fraction).

since we are dealing with fractions (divisions !), the best way to manipulate them is by multiplying or dividing them by a factor.

so, what do we need to multiply with 4 to get 8 (the other denominator) ?

2, as 4×2 = 8.

aha.

but now careful, we cannot just multiply the denominator by 2. that would change the value of the whole original fraction.

we have to multiply denominator AND numerator by the same factor. that way the original value of the fraction remains the same, because we are essentially multiplying the whole fraction just by 1.

so,

1/4 × 2/2 = 2/8

and now we can easily use it in a calculation with other 8ths :

5/8 - 2/8 = 3/8

its 4 cause i have done this

First, we isolate the variable on one side of the inequality by subtracting 15 from both sides:

15 - 2x - 15 ≤ 11 - 15

Simplifying the left side, we get:

-2x ≤ -4

Next, we divide both sides by -2. Since we are dividing by a negative number, we need to flip the inequality sign:

-2x/-2 ≥ -4/-2

Simplifying, we get:

x ≥ 2

Therefore, the solution to the inequality 15-2x ≤ 11 is x ≥ 2.

add me cuties

Answer:

y = -4x

b. y = -20.

Step-by-step explanation:

y = kx

-8 = 2k

k = -8/2

k = -4

y = -4x

y = kx

y = -4 × 5

y = -20

Answer:

slope=5/4 y intercept=-3/4

Step-by-step explanation:

put it into slope intercept form y=5/4x-3/4

pull out 5/4 as slope and -3/4 as y intercept

If the matrix C = [tex]\left[\begin{array}{cc}-6&6\\-2&4\end{array}\right][/tex], then the determinant of the matrix |C| = -12

The given matrix is

C = [tex]\left[\begin{array}{cc}-6&6\\-2&4\end{array}\right][/tex]

The matrix is defined as the set of numbers that arranged in rows and columns to form a rectangular array. The numbers in the matrix are called the elements of the matrix.

Here we have to find the determinant of the matrix C

The determinant of the matrix is defined as the scalar value calculated for a given square matrix.

The determinant of C is represented by |C|

Then,

C = [tex]\left[\begin{array}{cc}-6&6\\-2&4\end{array}\right][/tex]

|C| = -6×4 - 6×-2

= -24 -(-12)

= -24 + 12

= -12

Hence, if the matrix C = [tex]\left[\begin{array}{cc}-6&6\\-2&4\end{array}\right][/tex], then the determinant of the matrix |C| = -12

Learn more about matrix here

brainly.com/question/28180105

#SPJ1

The recursive definition of the arithmetic sequence -34, -21, -8 is:

It is a sequence of values in which the difference between consecutive terms is constant and is called common difference d.

The nth term of an arithmetic sequence is given by the rule presented as follows:

[tex]a_n = a_1 + (n - 1)d[/tex]

In which [tex]a_1[/tex] is the first term of the sequence.

An arithmetic sequence can also be defined recursively, as follows:

In this problem, the sequence is given as follows:

-34, -21, -8.

Hence the first term and the common ratio are given as follows:

Hence the recursive definition of the sequence is:

More can be learned about arithmetic sequences at https://brainly.com/question/6561461

#SPJ1

There is no vertex in the graph and the transformations from the parent function are

The graph represents the given parameter

As a general rule, the maximum or the minimum of a graph is the vertex

In this case, there is no maximum or minimum in the graph

This means that that there is no vertex in the graph

Here, we have:

We can see that:

The graph is 4 units to the left of the origin and 2 units below the origin

This means that the function has been shifted down and shifted to the left

Read more about vertex and transformations at

https://brainly.com/question/15709421

https://brainly.com/question/4289712

#SPJ1

The number of people the elevator would carry more if all passengers were children would be = 148 extra people.

An elevator is defined as the machine that is being installed in tall buildings which helps to transport individuals either to slower level or a higher level of the building.

The number of adults the elevator can carry at a time = 28 adults.

The number of children the elevator can carry at a time = 30 children.

During the course of the day the total capacity of the elevator= 28 × 74 = 2,072.

The number of people the elevator would carry more if all the passengers where children would be;

30 × 74 = $2,220

2,220 - 2,072 = 148 extra people.

Therefore, the number of people the elevator would carry more if all passengers were children would be = 148 extra people.

Learn more about addition here:

https://brainly.com/question/25421984

#SPJ1

The new odds that the box picked is a special one is 4

Since, there are four boxes that look the same. in one box (the special one), half of the marbles are blue. but only 1/8 of the marbles in the other boxes are blue.

We will have this hypothesis:

The box the blue marble was picked from is the special box.

Prior confidence we had:

Ratio of special boxes to non special boxes=1:3

Now P(blue &special)=1/2, given that a box is selected from the special box, there is 1/2 chance that it is blue

And P(blue & not special)=1/8, given that a box is selected from a non-special box, there is 1/8 chance that it is blue

According to  Baye's factor ,we get:

P(B & S)/P(B & NS)=(1/2)/(1/8)

                               =4

Thus, 4 is the new odds that the box picked is the special one.

To learn more about odds to probability; click here:

https://brainly.com/question/29316520

#SPJ4

[tex]\huge\mathcal{♨Answer♥}[/tex]

Answer is on the attachment...

☆...hope this helps...☆

_♡_mashi_♡_

The equation p=5xy+q can be expressed in terms of p,q, and x as y = (p-q)/5x.

The equation p=7x+4q can be expressed in terms of p and q as x = (p-4q)/7x.

Given in the first equation, p = 5xy+q

p-q=5xy

y=(p-q)/5x

Here we need to express y in terms of p,q, and x so we need all these three variables on one side of the equation and y on the other side. Initially we more q to the left-hand side of the equation which makes it p-q=5xy. Now we divide the left-hand side and the right-hand side by 5x making the equation y = (p-q)/5x.

Similarly in the second equation, p = 7x+4q

p-4q = 7x

x = (p-4q)/7

Here we need to express x in terms of p and q so we need all these two variables on one side of the equation and the term x on the other side. First, we will move 4q to the left-hand side of the equation which will make it p-4q=7x. Now, we will divide the whole equation by 7 which will make the equation x = (p-4q) / 7.

To learn more about simultaneous, transposing and rearrangement of the equations,

https://brainly.com/question/15165519

The area of the figure created by Brianna is  [tex]33\frac{3}{4}[/tex] square feet.

Explain area in mathematics.

Area is a mathematical concept that expresses the size of a region on a planar or curved surface. The area of an open surface or the boundary of a three-dimensional object is referred to as the surface area or, it can be simply defined as the total amount of space occupied by a flat (2-D) surface or an object's shape.

Solution Explained:

A square with a side of 4 1/2 feet and two parallelograms with bases of 4 1/2 feet and heights of 1 1/2 feet make up the figure.

Therefore, the total area of the figure is
Area of Square + 2 X Area of Parallelogram
= (side)^2 + 2(b X h)
= (4 1/2)^2 + 2(4 1/2 X 1 1/2)
= 81/4 + 27/2    
=  135/4
= [tex]33\frac{3}{4}[/tex] square feet

Area of the figure is [tex]33\frac{3}{4}[/tex] square feet.

To learn more about Area, use the link given
https://brainly.com/question/16519513
#SPJ1

Answer:

if the root is 10 then the function is ²✓5

The range of the given function is y ≥ 0 which is option B.

From the graph:

Some points (-1,1),(-2,2),(0,0),(1,1),(2,2)

Range is defined as the set of y values or outputs.

range = 0,1,2,3 ......

Means range starts from zero to infinite(0 to all positive values.

so range = y ≥ 0

Therefore  range of the given function is y ≥ 0 which is option B.

Learn more about the range and graph here:

https://brainly.com/question/2709928

#SPJ1

Answer:

33

Step-by-step explanation:

evaluate f(- 3) by substituting x = - 3 into f(x)

f(- 3) = 3(- 3)² - (- 3) + 5 = 3(9) + 9 + 5 = 27 + 14 = 41

evaluate f(4) by substituting x = 4 into f(x)

f(4) = 3(4)² - 4 + 5 = 3(16) + 1 = 48 + 1 = 49

Then

2f(- 3) - f(4) = 2(41) - 49 = 82 - 49 = 33

Using the simplification, the solution of the given expression for x is 107.5.

In the given question we have to solve the given expression.

The given expression is x-12.5=95.

Now solving the expression.

x-12.5=95

To solve the expression we add 12.5 on both side

x-12.5+12.5=95+12.5

x=107.5

The solution of the given expression for x is 107.5.

To learn more about simplification link is here

brainly.com/question/2804192

#SPJ1

There are 24,024 different ways to choose a President, Vice President, Treasurer, and Secretary from a group of 14 students.

Permutation is the arrangement of objects in a specific order. It is the number of different ways in which a set of objects can be arranged in a specific order. The formula to calculate permutation is:

[tex]P(n, r) = n! / (n - r)![/tex]

Permutations are commonly used in mathematics, science, and engineering, and are useful for solving problems that involve counting the number of possible arrangements of objects or events.

We can use the formula for permutations to find the number of ways to choose the four officers from a group of 14 students.

The number of permutations of n objects taken r at a time is given by:

[tex]^nP_r = n! / (n - r)![/tex]

where n! denotes n factorial, which is the product of all positive integers up to n. For example, 5! = 5 x 4 x 3 x 2 x 1 = 120.

In this case, we want to choose 4 students from a group of 14, and the order in which they are chosen matters (since we are electing them to specific positions). So we have:

n = 14

r = 4

The number of ways to choose the four officers is therefore:

[tex]^1^4P_4 = 14! / (14 - 4)! = 14 \times 13 \times 12 \times 11 = 24,024[/tex]

Therefore, there are 24,024 different ways to choose a President, Vice President, Treasurer, and Secretary from a group of 14 students.

To know more about Permutation visit:

brainly.com/question/1216161

#SPJ1

Systematic random sampling is the sampling method is the auditor using for each salesperson.

Sampling techniques in a statistical study refer to how participants are chosen from the population to participate in the study. If a sample isn't chosen at random, it will likely be skewed in some way, and the results might not be generalizable.

Given,

The sales force for a publishing company is constantly on the road trying to sell books. as a result, each salesperson accumulates many travel-related expenses that he or she charges to a company-issued credit card. to prevent fraud, management hires an outside company to audit a sample of these expenses. for each salesperson, the auditor prints out the credit card statements for the entire year, randomly chooses one of the first 20 expenses to examine, and then examines every 20th expense from that point on.

Systematic random sampling is the sampling method is the auditor using for each salesperson.

To learn more about sampling method, visit:

https://brainly.com/question/12902833

#SPJ4

By using tangent property of circle, it has been proved that [tex]\Delta[/tex] ABC is isosceles

What is tangent to a circle?

At first it is important to know about circle.

Circle is a two dimensional round figure in which every point of the circle maintains a fixed distance from a point known as the center. The fixed distance is called the radius of the circle.

The straight line which touches the circle at any point is known as the tangent to a circle.

Tangent property of circle is used here

[tex]\angle BAY = 72^{\circ}[/tex]

[tex]\angle ABC = 54^{\circ}[/tex]

[tex]\angle ACB = 72^{\circ}[/tex] [Angle in alternate segment are equal]

[tex]\angle BAC = 180 - (54 + 72)\\[/tex] [Sum of three angles of a triangle is 180°

          =   180 - 126

          =   54°

[tex]\Delta ABC[/tex] is isosceles

To learn more about tangent of a circle, refer to the link-

https://brainly.com/question/16507124

#SPJ9

the company uses 37 screws to make each table and 14 screws to make each chair. The company needs to order screws for 12 tables and 48

Answer:

-.5

Step-by-step explanation:

u=2+-2.5=.5

From the given table which represents the two system of linear function is given by y = -4x +10 and y = -3x +2 , the solution of the system of linear function is (x, y) = (8 , -22).

As given in the question,

Table which represents the system of linear function are as follow:

table 1:

x:      -4       -2        0       2

y:     26       18       10     2

table 2:

x:      -4       -2        0       2

y:     14       8         2      -4

For table1 :

System of linear function:

(x₁ , y₁) = (0,10)

(x₂ , y₂) = (2, 2)

Equation of linear function:

(y -y₁)/ (x-x₁) =(y₂ -y₁)/(x₂ -x₁)

⇒(y -10)/ (x-0) =(2-10)/(2-0)

⇒y-10 =-4(x)

⇒ y = -4x +10     __(1)

For table2 :

System of linear function:

(x₁ , y₁) = (0,2)

(x₂ , y₂) = (2, -4)

Equation of linear function:

(y -y₁)/ (x-x₁) =(y₂ -y₁)/(x₂ -x₁)

⇒(y -2)/ (x-0) =(-4-2)/(2-0)

⇒y-2 =-3(x)

⇒ y = -3x +2     __(2)

Solve system of linear function (1) and (2) we get,

-4x +10 = -3x +2

⇒4x -3x =10 -2

⇒x =8

⇒y = -4(8) +10

     = -22

(x, y) = (8 ,-22)

Therefore, from the given table which represents the two system of linear function is given by y = -4x +10 and y = -3x +2 , the solution of the system of linear function is (x, y) = (8 , -22).

Learn more about linear function here

brainly.com/question/21107621

#SPJ1

Answer:

D

Step-by-step explanation:

trust

Answer:

-1/4 * x + 2

Step-by-step explanation:

first figure out the slope. You can easily read the point where the graph is crossing the y axis. From there, more right and read how much the graph goes up wor down. You see the graph goes down, so you know the slope must be a negative value. To get the full value of the slope, you need to work out how much the graph goes down if you go 1 right. So when you move 1 right from the point 2 on the y axis, you can't easily read how much it went down. But you can see that the graph passes the pont of x = 4 and y = 1. So it went 4 right and 1 down. To only got 1 down you divide y/x -> 1/4
So the slope is -1/4
and because the graph hits the y axis at 2 and not at 0, you need to add +2 to the equation.

The calculation that is not a way to find a fraction of 5/8 is:

1 - 0.125.

A fraction is a numerical representation of the division of the two terms x and y, as follows:

Fraction = x/y.

The terms are classified as follows:

Hence the numeric value of the fraction 5/8 presented in this problem is given as follows:

5/8 = 0.625.

The calculation that is not a way to find the fraction of 5/8 is the only expression that has a different value than 5/8.

The expression with a different value is of:

1 - 0.125 = 0.875.

As the value of 0.875 is different than the value of 0.625 equivalent to the fraction of 5/8.

The complete problem is given by the image at the end of the answer.

More can be learned about fractions at https://brainly.com/question/1622425

#SPJ1

Answer:

decimal form> -4.87577494

Exact form> -In(212)/In(3)

By applying the SSS similarity theorem, the value of x that will make the provided triangles similar is 77.

SSS Similarity Theorem: What is it?

The SSS similarity theorem is used to determine whether or not two triangles are similar.

The side-side-side, or SSS. According to this theorem, triangles are comparable if all three sides of one triangle are proportional to the three equivalent sides of another triangle.

The first triangle's sides in the example figure are 35, 20, and 20. The second triangle has sides x, 44, and 44.

So, according to the SSS similarity theorem,

x/35 = 44/20

x =44 *35 /20

x =77

By applying the SSS similarity theorem, the value of x that will make the provided triangles similar is 77.

Learn more about SSS similarity theorem :

brainly.com/question/26643163

#SPJ4

Answer:28

Step-by-step explanation:

Answer:

x=6

Step-by-step explanation:

-2x-6=-18

     +6. +6

-2x=-12

/-2. /-2

x=6

Hopes this helps please mark brainliest

Answer:

[tex](x+5)^{2}+(y-7)^{2} =16[/tex]

Step-by-step explanation:

The Standard Form of Circle Equation whose Center is at ( h , k) and Radius of r is given by

[tex](x-h)^{2}+(y-k)^{2} =r^{2}[/tex]

So for our Question

we have ( h , k ) = ( -5 , 7 )  and r = 4

By substitution

[tex](x-(-5))^{2}+(y-7)^{2} =4^{2}[/tex]

Simplify [tex](x+5)^{2}+(y-7)^{2} =16[/tex]