Pls answers this I need help on homework

The ratio of false positives to true positives is 8 over 54.

According to the Question

Results of a strep throat test performed on a sample of 400 ill people are displayed in the table's data. People who have the flu and those who don't are separated into two categories. The patients are then separated into groups based on whether they tested positive or negative for strep throat within each of these categories.

We must first define what a true positive and a false positive are in order to calculate the ratio of false positives to true positives. A patient who tests positive for strep throat but does not actually have the illness is said to have a false positive. The 8% of patients in this instance who tested positive for strep throat but did not have the flu would fall under that category. A patient who tests positive for strep throat and truly has the illness is said to have a true positive. That would be the 54% of patients who tested positive for both the flu and strep throat in this instance.

We divide the percentage of false positives (8%) by the percentage of true positives (54%), which gives us the ratio of false positives to true positives.

As a result, the ratio becomes 8% / 54%, or 8/54.

It's critical to remember that this ratio is dependent on the sample and test performed and may not be the same for different populations or testing methodologies.

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Answer:

360

Step-by-step explanation:

0.06x6000=360 also that 6% equal 6/100 wich is 0.06

Answer:

Okay so 6,0 3,1 4,1 and 0,2

Step-by-step explanation:

    So take 3,1 you would go over 3 on the x axes and up 1 on the y axes

On soloing the provided question, we can say that an equation from the graphs for the function. 3x + 13.5y = 4.5 and x+1.5y = 2

Mathematicians use graphs to logically represent or chart facts or values. Typically, a graph point will show the relationship between two or more objects. A graph is a non-linear data structure made up of nodes, or vertices, and edges. The nodes, also known as vertices, should be joined with glue. This graph's vertices are 1, 2, 3, and 5, while its edges are 1, 2, 1, 3, 2, 4, and 2.5. (3.5). (4.5). Graphical depictions of exponential growth in statistical charts (bar charts, pie charts, line charts, etc.). triangle-shaped logarithmic graph.

an equation for the function.

3x + 13.5y = 4.5

and x+1.5y = 2

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The total of the two terms that represent the length of the garden's walkway:  26x + 28

A walkway around a rectangular garden.

Simplifying each equation.

Area of the garden : 4(4.5 x + 1.5) = 18x + 6

Combined area:  5.5(8 x + 4) = 44x + 22

Thus,

Area of walkway = Combined area - Area of the garden

                                = 44x + 22 - 18x + 6

                                = 26x + 28

Thus, the total of the two terms that represent the length of the garden's walkway:  26x + 28

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The set that represents a Pythagorean Triple is given as follows:

C. 30,40,50

The Pythagorean Theorem states that for a right triangle, the length of the hypotenuse squared is equals to the sum of the squared lengths of the sides of the triangle.

For item c, we have that:

30² + 40² = 50²

900 + 1600 = 2500

2500 = 2500.

Which is a true statement, hence item c represents the Pythagorean Triple in the context of this problem.

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Answer:

x = 16

Step-by-step explanation:

(2x+13)° = (3x-3)° [vertically opposite angles]

2x + 13 = 3x - 3

2x - 3x = -3 - 13

        -x = -16

      ∴ x = 16

If Amy uses 41-cent stamps and 6-cent stamps to mail a gift card to a friend worth of $1.77 , then the number of 41 cent stamp used is 3  and the number of 6 cent stamps used is  9 .

Let the number of 41 cents stamps used in postage is = x ;

let the number of 6 cents stamps used in postage is = y ;

the amount 41 cents in dollars is = $0.41  ;

and amount 6 cents in dollars is = $0.06  ;

Amy used 41-cent stamps , 6-cent stamps to pay $1.77 in postage

it is represented in equation form as  ⇒ 0.41x + 0.06y = 1.77

Multiplying on both sides by 100 , we get

⇒ 41x + 6y = 177  ;

⇒ y = (177 - 41x)/6 ;

We will test for corresponding values of x and y to satisfies this equation and the number of stamps must be whole numbers.

If x = 1 , then y = 26.66

If x = 2 , then y = 15.83

If x = 3 , then y = 9

If x = 4 , then y = 2.16 .

the only values that shows a whole number is : If x = 3 , then y = 9 .

Therefore , Amy used "3" 41-cents stamps and "9" 6-cent stamps .

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Answer:  37.5

Step-by-step explanation: To find this, we must move the decimal place one spot over. It would now look like this:

300. ÷ 8

Now for the division look at the attachment. In the end, you've should've got 37.5. To check if that's right, you'd multiply 0.8 and 37.5. Then again, you should get 30. I hope this helped!

The required function is 200 (1.4)ˣ = 5, where the value of x is calculated to be -11.

The given function is y = a bˣ

x₁ = 0, y₁ = 200

x₂ = 2,  y₂ = 392

Let us determine a, b.

a b⁰ = 200

a b² = 392

a = 200

200 b² = 392

b² = 392/200 = 49/25 = 7/5 = 1.4

So, the function is y = 200 (1.4)ˣ

Now, let us determine x for y = 5,

200 (1.4)ˣ = 5

(1.4)ˣ = 0.25

Taking log on both sides,

log (1.4)ˣ = log 0.025

x log 1.4 = log 0.025

x = log 0.025/log 1.4

x ≈ -11

This means the embryo was implanted on March 10th and she visited the doctor 11 days later.

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Part A: The respondents in the population are a voluntary response sample.

Part B: The responses may not reflect the opinions of the general population

The total number of internet users in those is 1072 people.

The percentage of the total number of people that chose to respond is 38%

We can note that this survey does not compel the population to respond to the survey. These responses are given by the voluntary respondents.

Another point is that a voluntary response sample is a sample that consists of participants who are interested to participate in a sample group voluntarily.

In this type of survey, the people who are supposed to decide to provide voluntary responses to the survey are called voluntary response samples.

The percentage of those that chose to respond to this survey which is 38% is less than half of the total population. This result shows that the responses may not reflect the opinions of the general population.

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395 gallons will contain 1,495.075 L of water.

A gallon is a unit of liquid measure equal to eight pints. It is approximately 4.546 litres in the United Kingdom.

It is about 3.785 litres in the United States.

To convert litres to gallons, for example, a quart is somewhat less than a litre and 4 litres is slightly more than 1 gallon. 1 litre equals 0.264 gallon (a little more than a quart), and 4 litres equals 1.06 gallon.

One US gallon is approximately 3.79 litres;

one imperial gallon is approximately 4.55 litres.

The dry gallon in the United States is roughly 4.41 litres. As a result, one gallon, regardless of kind, is always larger than one litre.

One gallon contains 3.785 L of water,

Hence 395 gallons will contain 3.785395 3.785×395 Liters of water,

ie, 3.785395 = 1,495.075 L of water.

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Answer:

  2.6 km

Step-by-step explanation:

You want the total distance from Tracey's house to John's house to school, and back again, when the distance from Tracey's to John's is 0.5 km, and the distance from John's to school is 0.8 km.

The total distance will be the sum of the parts:

Total distance = (0.5 +0.8 +0.8 +0.5) km = 2(0.5 +0.8) km = 2(1.3 km)

  = 2.6 km

Tracey rode 2.6 km altogether.

Answer:

I also need help

Step-by-step explanation:

A ship is on its maiden voyage to the mystery island. According to the map, it has to travel

99 miles to the north and then, 20 miles to the west to reach the island. Find the shortest

route that leads to the mystery island.

Answer:

20 miles

Step-by-step explanation:

would you rather go 99 miles or 20 miles

Randy's cake situation will be better solved in the following manner:

a) If the area of a round cake and a square cake are different then the quarter portion will be different.

b) Though as a concept 1/4 + 1/4 = 2/4, it is not actually true in this case. If the area of different cakes are different then the quarters will also be different.

Measuring a particular region or patch of a figure is its area. Area is significant in contemporary mathematics. Area is crucial in geometry and calculus, but it also plays a role in the definition of determinants in linear algebra and is a fundamental characteristic of surfaces in differential geometry.

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The area of trapezoid is 47.5 cm².

A quadrilateral having only two sides parallel.The area of a trapezoid is the half of the product of sum of its parallel sides to the height of that trapezoid (the distance between those parallel sides).

Thus, if we have:

Length of its parallel sides = 'a' and 'b' units respectively

Perpendicular distance between its parallel sides = 'h' units,

Then, we get:

[tex]A = \dfrac{1}{2}\times(a+b) \times h \: \rm unit^2[/tex]

Given;

trapezoid has two bases that measure 11 cm and 8 cm.

a= 11 cm, b= 8 cm

Now, height= 5

A = (½* height) x (Sum of the bases)

A= 1/2 * ( 11 + 8) * 5

A= 95/2

Therefore, the Area trapezoid will be 47.5 cm²

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The complete question is;

A trapezoid has two bases that measure 11 cm and 8 cm. The height of the figure is 5 cm. What is the area of the trapezoid?

The equation of the line parallel to the line is y = -4x + 10

The equation of the line perpendicular to the line is y = 1/4x +3/2

Using the point (1, 6) and (2, 2) on the line to get the slop:

Slope = 2-6/2-1

Slope = -4/1

Slope = -4

The equation is written in point slope form as y-y0 = m(x-x0)

Substitute a point and the given slope for the equation parallel to the line

y - 2 = -4(x-2)

y - 2 = -4x + 8

y+4x = 10

Hence the equation of the line parallel to the line is y = -4x + 10

The needed slope for the perpendicular line is 1/4.

Substitute a point and the given slope for the equation parallel to the line

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

4(y - 2) = x - 2

4y - 8 =x -2

4y = x + 6

y = 1/4x + 3/2

Hence the line perpendicular to the line is y = 1/4x + 3/2

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The following question may be like this:

write an equation of the line that passes through the given points and is perpendicular to the given line.

The symmetries of a rectangle and those of a rhombus are not the same, as the rectangle has two additional symmetries.

A rhombus is a quadrilateral with all sides of equivalent length, and it has the accompanying symmetries:

Identity symmetry: The rhombus stays unaltered when reflected about its center.

Rotational symmetry: The rhombus stays unaltered when pivoted 180 degrees about its center.

Reflective symmetry: The rhombus stays unaltered when reflected about its two diagonals.

These symmetries structure a gathering under the operation of the organization of symmetries. A gathering is a bunch of components with a twofold operation (for this situation, the creation of symmetries) that fulfills the cooperative, identity and converse properties.

The arrangement of symmetries of a rhombus fulfills these properties, making it a group.

The Cayley table for the symmetries of a rhombus is as per the following:

E R1 R2 R3

R1 E R3 R2

R2 R3 E R1

R3 R2 R1 E

Where E addresses the identity symmetry, R1 addresses the 180-degree turn symmetry, R2 addresses the symmetry around one diagonal, and R3 addresses the symmetry about the other diagonal.

Then again, the symmetries of a rectangle are:

Identity symmetry: The rectangle stays unaltered when reflected about its center.

Rotational symmetry: The rectangle stays unaltered when pivoted 180 degrees about its center.

Reflective symmetry: The rectangle stays unaltered when reflected about its two vertical and two horizontal axis.

The Cayley table for the symmetries of a rectangle is as per the following:

E R1 R2 R3 R4

R1 E R3 R2 R4

R2 R3 E R1 R4

R3 R2 R1 E R4

R4 R4 R4 R4 E

Where E addresses the identity symmetry, R1 addresses the 180-degree turn symmetry, R2 addresses the symmetry around one vertical axis, R3 addresses the symmetry around one horizontal axis and R4 addresses the symmetry about the two diagonals.

We can see that the arrangement of symmetries of a rectangle and those of a rhombus are not something similar.

The rectangle has two additional symmetries, the symmetry around one vertical and one horizontal axis, which are not present in the rhombus.

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An integer is the number zero, a positive natural number or a negative integer with a minus sign. The negative numbers are the additive inverses of the corresponding positive numbers. In the language of mathematics, the set of integers is often denoted by the boldface Z or blackboard bold \mathbb {Z}.

Answer:

the third graph

Step-by-step explanation:

1. increase - then you know the line has to go upwards.  so only first &3rd lines are potentially correct answer

2. look at the Y axis markings, first one goes from 5 to 11, it increased by 6.  so it's not right.

answer is the 3rd one.

Answer:

Case 1 : x = - 2, y = 3

Case 2 : x = 5. y = 2

Step-by-step explanation:

Case 1

5y + x = 13 --------> Eq 1

y - x = 5  ---------> Eq 2

Add both Eq 1 and y,

5y + x = 13

 y  - x =  5

________

6y + 0 = 18

6y = 18

y = 18/6

y = 3

Substitute y = 3 in Eq 2,

3 - x = 5

3 - 5 = x

- 2 = x

x = - 2

Hence,

x = - 2

y = 3

Case 2

2x + y = 12 ---------> Eq 1

6x + 5y = 40 -----------> Eq 2

Multiply Eq 1 with 3,

3(2x + y = 12)

6x + 3y = 36 --------> Eq 3

Eq 2 - Eq 3,

 6x + 5y = 40

- 6x - 3y  = - 36

_____________

  0  + 2y = 4

2y = 4

y = 4/2

y = 2

Substitute y = 2 in equation 1,

2x + 2 = 12

2x = 12 - 2

2x = 10

x = 10/2

x = 5

Hence,

x = 5

y = 2

Answer: 22

Step-by-step explanation:

25+ [14 - {8+ (13-4)}]​

= 25 + [14 - {8 + 9 }]​

= 25 + [14 - 17]

= 25 - 3

= 22

The radical expression completely:

Square root of [tex]48x^2y^5z[/tex] is  4[tex]xy^2[/tex] × sqrt(3y)

Now, According to the question:

Factor 48 into its prime factors

          48 = 24 × 3

To simplify a square root, we extract factors which are squares, i.e., factors that are raised to an even exponent.

Factors which will be extracted are :

          16 = [tex]2^4[/tex]

Factors which will remain inside the root are :

          3 = 3

To complete this part of the simplification we take the square root of the factors which are to be extracted. We do this by dividing their exponents by 2 :

          4 = [tex]2^2[/tex]

At the end of this step the partly simplified SQRT looks like this:

        4 × sqrt[tex](3x^2y^5)[/tex]z

Rules for simplifying variables which may be raised to a power:

  (1) variables with no exponent stay inside the radical

  (2) variables raised to power 1 or (-1) stay inside the radical

  (3) variables raised to an even exponent: Half the exponent taken out, nothing remains inside the radical. examples:

    (3.1) sqrt[tex](x^8)=x^4[/tex]

    (3.2) sqrt(x-6)=x-3

(4) variables raised to an odd exponent which is  >2  or < (-2) , examples:

     (4.1)[tex]sqrt(x^5)=x^2sqrt(x)[/tex]

    (4.2) sqrt(x-7)=x-3sqrt(x-1)

Applying these rules to our case we find out that

    SQRT[tex](x^2y^5) = xy^2[/tex]SQRT(y)

Simplified root:

4[tex]xy^2[/tex] × sqrt(3y)

Hence, the radical expression completely:

Square root of [tex]48x^2y^5z[/tex] is  4[tex]xy^2[/tex] × sqrt(3y)

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In the diagram which shows right triangular prism UVWXYZ, the volume of UVWXYZ can be expressed in  nearest tenth as 750 cm^3.

The concept that will be used here is volume. In mathematics, 'Volume' is a mathematical quantity that shows the amount of three-dimensional space occupied by an object or a closed surface. The unit of volume is in cubic units such as m3, cm3, in3

√ (12.5^2 -7.5^2) =10 cm

The volume can be calculated as : (1/2 * 7.5 * 10 *20

=750 cm^3

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The girl has a shadow of 10.72 ft if she has a 5 ft tall and the sun is 25 degrees.

5 ÷ tan (25°)

5 ÷ tan (25°)

5 ÷ 0.466308

10.722527

When measuring the area of a right shadow, the ratio of the opposite side to the adjacent side is known as the tangent ratio. Right angle can have their angles and sides determined using tangent ratios, just as sine and cosine ratios.

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The potential energy of the ball will be 7200 Joules.

Given is a 6-kg bowling ball sits on top of a building that is 120 meters tall.

We can write the potential energy of the ball as -

E = mgh

E = 6 x 10 x 120

E = 60 x 120

E = 7200 Joules

Therefore, the potential energy of the ball will be 7200 Joules.

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Answer: alternate exterior angles

Step-by-step explanation:

They are equals if the two intersected lines by the transversal are parallel. In the figure, angles 1 and 4 are alternate exterior angles. Angles that are on opposite sides of the transversal of two other lines.

The total number of different flight arrangements the airline can offer from New York to Hawaii is 42.

The airline has 6 flights from New York to California and 7 flights from California to Hawaii per day. Therefore, the total number of different flight arrangements the airline can offer from New York to Hawaii is 6 x 7 = 42.

The airline has the capability to offer 42 different flight arrangements for travel from New York to Hawaii by combining the number of flights available per day from New York to California (6) with the number of flights available per day from California to Hawaii (7). This calculation is done by multiplying the number of flights from New York to California by the number of flights from California to Hawaii.

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In 420 ways different ways can you select the question.

you can answer any 12 questions from a total of 14 questions on an exam

At least 8 questions, including 3 from the last section, must be attempted out of the 5 questions in part and the 7 questions in part 2.

There are three choices.

&% from part 2; (1)3 from part 1

= ⁵C 3 × ⁷ C 5

= 3!(5−3)!/5! × 5!(7−5)!/7!

= 2/5×4 ×= 2/7×6

=5×2×7×3

=210 ways

(2)4 from part 1 & 4 from part 2

= ⁵C 3 × ⁷ C 5

=4!(5−4)!/5!

×= 4!(7−4)!/7!

​=5×= 3×2×1/7×6×5

=5×7×5

=175 ways

(3)5 from part 1 & 3 from part 2

= ⁵C 3 × ⁷ C 5

= 5! 0!/5!

​×= 3!(7−3)!/7!

​=1×= 3×2/7×6×5

​=35 ways

Total number of ways =210+175+35

420 ways

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Answer:

5 millimeters

Step-by-step explanation:

15 = 3x

5 = x