A motorist travels 228 kilometers in 6 hours. At that rate, how long will it take him to travel and additional 247 kilometers?

Answers

Answer 1

Answer:

The motorist's rate is:

rate = distance / time

where distance is measured in kilometers and time is measured in hours.

We are given that the motorist travels 228 kilometers in 6 hours, so we can use this information to find the rate:

rate = distance / time = 228 km / 6 hours = 38 km/hour

To find how long it will take the motorist to travel an additional 247 kilometers at this rate, we can use the same formula and solve for time:

time = distance / rate = 247 km / 38 km/hour ≈ 6.5 hours

Therefore, it will take the motorist approximately 6.5 hours to travel an additional 247 kilometers at the same rate of 38 km/hour.


Related Questions

Natalia paid $40 for 4 t-shirts and a necklace.
If Natalia paid $12 for the necklace, how much did each shirt cost?

Answers

each t-shirt cost $7.

If Natalia paid $12 for the necklace, then Each t- shirt cost $7.

What is the unitary method?

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value. Unitary method is a technique by which we find the value of a single unit from the value of multiple devices and the value of more than one unit from the value of a single unit.

We are given that Natalia paid $40 for 4 t-shirts and a necklace.

If Natalia paid $12 for the necklace, then;

We need to find the cost of each shirt.

Therefore,

cost of 4 t- shirt + 1 neclace = 40

40 - 12 = 28

Cost of 4 t- shirt = 28

Cost of 1 t- shirt = 28/4 = 7      

Hence, the cost of each t shirt is $7.

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Write the following sets of the following problems using the descriptive method (please help)

1- Mathematics

2- Rain , Snow , Sunny

3- Canada , Mexico , United States

Answers

1.The set of all mathematical concepts .

2.The set of possible weather conditions in which an area can experience.

3.The set of countries that make up the North American continent.

What are the sets ?

Sets, in mathematics , are a coordinated assortment of articles and can be addressed in set-manufacturer structure or list structure. Curly braces are typically used to represent sets.

1- Mathematics:

The collection of all mathematical concepts and guiding principles pertaining to the investigation of quantity, structure, space, and change. Math, algebra, geometry, trigonometry, calculus, probability, and statistics are all included in this.

2- Rain, Snow, Sunny:

The arrangement of conceivable weather patterns where a region can insight. This includes rain, which is the term used to describe the liquid water droplets that fall from clouds; snow, which refers to ice crystals falling from clouds; and sunny, a weather condition characterized by abundant sunlight and clear skies.

3- Canada, Mexico, United States:

The group of nations that make up the continent of North America. Canada, which is in the north of the continent, is included in this. Mexico, which is in the continent's southernmost region; and the United States of America, which is in the middle of the continent. The numerous cultures, histories, and geographies of these nations define them.

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According to shopper data, 97% of households purchase
toilet paper. An analyst believes this is too low. To
investigate, the analyst selects a random sample of 500
households and finds that 98% of them purchase toilet
paper. We found that we do not have convincing
evidence at the a= 0.05 level to conclude that the true
proportion of all households that purchase toilet paper
differs from 0.97.
It can be difficult to detect such a small difference, such
as from 0.97 to 0.98, even if the difference exists.
What can be done to increase the power of this test to
reject 0.97 if 0.98 is true? Check all that apply.
increase a
decrease a
O increase n
decrease n
discard first results and select a separate random
sample of 500 households

Answers

To increase the power of this test to reject 0.97 if 0.98 is true, the following can be done:
- Increase n (sample size)
- Decrease the level of significance (a)
- Discard the first results and select a separate random sample of 500 households

Therefore, the correct options are:
- Increase n
- Decrease a
- Discard first results and select a separate random sample of 500 households

*Photo*
Scatter plot photos from last
post

Need asap by 11am

Answers

Answer:28 or 29 can't tell if the x is supposed to be on the 28 or 29

Step-by-step explanation:

4) Amy traveled to the recycling plan
back. It took one hour less time to get
there than it did to get back. The average
speed on the trip there was 50 km/h. The
average speed on the way back was 40
km/h. How many hours did the trip there
take?

Answers

The time taken by Amy to travel to the place was t = 4 hours.

What is average speed?

A measure of average speed is the amount of distance travelled in a given amount of time. It is determined by dividing the overall mileage by the overall time required to cover that mileage.

In physics and other sciences, average speed is frequently employed to describe how objects move. For instance, it is possible to estimate how long it will take to go a certain distance or assess a car's fuel economy by looking at its average speed over a given distance. By dividing the whole distance travelled by the total time required, average speed may also be used to characterise the speed of an object that is moving at various speeds at different points along its path.

Let the time taken to get back = t + 1.

Now, it took one hour less time to get there thus time = t.

Now, average speed is given as:

average speed = total distance / total time

Substituting the values:

50 km/h = d / t

d = 50t  .........(1)

40 km/h = d / (t + 1)

d = 40(t + 1)......(2)

Setting the value of d as equal we have:

50t = 40(t + 1)

50t = 40t + 40

10t = 40

t = 4

Hence, the time taken by Amy to travel to the place was t = 4 hours.

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Magdalene creates the scale drawing shown of a rectangular field.
7.2 cm
Scale
1 cm = 4.5m
3 cm
What is the area, in square meters (m²), of the actual field?

Answers

The scale of the drawing is 1 cm = 4.5 m. This means that each centimeter in the drawing represents 4.5 meters in the actual field. The length of the field in the drawing is 7.2 cm, so the actual length of the field is 7.2 cm × 4.5 m/cm = 32.4 m. The width of the field in the drawing is 3 cm, so the actual width of the field is 3 cm × 4.5 m/cm = 13.5 m. The area of a rectangle is found by multiplying its length by its width, so the area of the actual field is 32.4 m × 13.5 m = 437.4 m²

Note :- I'm sorry to bother you but can you please mark me BRAINLEIST if this ans is helpfull

Surface area of the shape

Answers

The total surface area of diagram is 119.1 unit

Define rectangular pyramid?

A rectangular pyramid is a three-layered strong item that comprises of a rectangular base and four three-sided faces that meet at a typical point, called the summit.

In the figure below is a cuboid and upside is Square Pyramid;

Surface area of cuboid = 2 (l×h + l×w+ h×w)

Surface area of cuboid = 2 (6×3 + 6×3+ 3×3)  = 2 (18+18+9)

Surface area of cuboid = 90 unit²

The slant height is the hypotenuse of a right triangle whose height is 3 inches and half the base of the triangular (3/2 = 1.5 inches). Using the Pythagorean theorem,

slant height = [tex]\sqrt{3^2 + 1.5^2}[/tex]   [tex]= \sqrt{11.25}[/tex]

slant height = 3.35 unit

Surface Area of a Square Pyramid = base² + 2×base×slant height

Surface Area of a Square Pyramid = 3² + 2×3×3.35

Surface Area of a Square Pyramid = 9 + 20.1

Surface Area of a Square Pyramid = 29.1 unit²

The total area of these two faces =  Surface area of cuboid + Surface area of pyramid.

The total Surface area = 90 + 29.1 = 119.1 unit²

Therefore total area of diagram is 119.1 unit²

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A display case is made of one rectangular prism stacked on top of a second rectangular prism. What is the volume of the display case? A.24 B.36 C.60 D.84,is it b right?

Answers

The volume of the display case is 60 + 120 = 180. The correct answer is B. 36.

What is volume?

Volume is a measure of the three-dimensional space something occupies or contains. It is often expressed as a calculation of length x width x height. It can also refer to the amount of something, such as the volume of a liquid, or the amount of space a container holds. Volume is an important concept in mathematics, science, engineering, and many other fields. It is used to measure the size of a solid, liquid, or gas, and to quantify the amount of material in an object or a space.

The volume of a rectangular prism is determined by multiplying its length, width, and height. The volume of a display case made of one rectangular prism stacked on top of a second rectangular prism is equal to the sum of the volumes of each rectangular prism.

The volume of the first rectangular prism is 3 x 4 x 5 = 60.
The volume of the second rectangular prism is 4 x 5 x 6 = 120.

Therefore, the volume of the display case is 60 + 120 = 180. The correct answer is B. 36.

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PLEASE HELP
The scatter plot shows the time spent studying, X, and the midterm score, y, for each of 25students.
Time spent studying (in hours)
Use the equation of the line of best fit, y=3.84×+16.64, to answer the questions below.
Give exact answers, not rounded approximations.
(a) For an increase of one hour in the time spent studying,
what is the predicted increase in the midterm score?
(b) What is the predicted midterm score for a student who
doesn't spend any time studying?
(c) What is the predicted midterm score for a student who
studies for 12 hours?

Answers

The equation of the line of best fit is y = 3.84x + 16.64, where x is the time spent studying and y is the predicted midterm score.

(a) For an increase of one hour in the time spent studying, the predicted increase in the midterm score can be found by taking the derivative of the equation with respect to x:

dy/dx = 3.84

Therefore, for an increase of one hour in the time spent studying, the predicted increase in the midterm score is 3.84.

(b) To find the predicted midterm score for a student who doesn't spend any time studying, we can substitute x = 0 into the equation:

y = 3.84x + 16.64
y = 3.84(0) + 16.64
y = 16.64

Therefore, the predicted midterm score for a student who doesn't spend any time studying is 16.64.

(c) To find the predicted midterm score for a student who studies for 12 hours, we can substitute x = 12 into the equation:

y = 3.84x + 16.64
y = 3.84(12) + 16.64
y = 64.16

Therefore, the predicted midterm score for a student who studies for 12 hours is 64.16.

Meghan is spending money at a constant rate. Suppose she initially has $1100, and after 4 months, she has $720.

Express the rate at which Meghan's amount of money is changing.

Answers

95$

Step-by-step explanation:

Based on the given conditions, formulate ( 1100 - 720 ) ÷ 4

Calculate the sum or difference = 380/4

Cross out the common factor = 95

find the greatest common factor of

1/4n^2m^3,
5/20n^7m^8,
3/12n^2m^8

options are

n^3m^2
1/4 n^3m^2
n^2m^3
1/4 n^2m^3

Answers

To find the greatest common factor of these three terms, we need to factor each one and identify the highest power of each factor that is common to all three. Then, we can multiply those factors together to find the GCF.

Let's begin by factoring each term:

1/4n^2m^3 = (1/4) * n^2 * m^3

5/20n^7m^8 = (1/4) * n^7 * m^8

3/12n^2m^8 = (1/4) * n^2 * m^8

Now, we can see that each term has a common factor of 1/4, so we can factor that out:

1/4 * (n^2 * m^3)

1/4 * (n^7 * m^8)

1/4 * (n^2 * m^8)

To find the highest power of each factor that is common to all three terms, we need to look at the exponents. The highest power of "n" that is common to all three terms is 2, and the highest power of "m" that is common to all three terms is 3. Therefore, the GCF is:

1/4 * n^2 * m^3

This simplifies to:

n^2m^3/4

So, the correct option is (c) n^2m^3/4.

A group of friends decided to go out of town to a championship football game. The group pays $85 per ticket plus a one-time convenience fee of $35. They also pay $26 each to ride a tour bus to the game. If the group sent $3,587 in total, how many friends are in the group?

Answers

Answer: The group size is 32 friends.

Step-by-step explanation:

We will consider the total number of friends as x

The total expenditure can be broken down into the following equation:

85*x + 35 + 26*x = 3587

111x = 3587-35

111x = 3552

x = 3552/111

x = 32

Select the correct answer.
Simplify:
3x3² +8÷2-(4+3)
A.
30
B. 32
OC. 23
OD. 24
I need it asap pleasee

Answers

Answer:

OD:24

Step-by-step explanation:

3*3”2 = 27

-(4+3) = -7

8divided by 2= 4

27 + 4 -7=24

how to plot 4x-5y less than equal to -15

Answers

The answer of the given question based on the plotting graph , the steps are given below .

What is Inequality?

An inequality is a statement that compares two values or expressions and indicates that one is greater than, less than, or equal to the other. Inequalities can be solved or simplified using various algebraic techniques, such as adding, subtracting, multiplying, or dividing both sides by the same quantity, or factoring and finding the roots of the expressions

To plot the inequality 4x - 5y ≤ -15, you can follow these steps:

First, rearrange the inequality to solve for y:

4x - 5y ≤ -15

-5y ≤ -4x - 15

y ≥ (4/5)x + 3

This gives you the equation of the boundary line. Plot this line on a graph by plotting two points and drawing a straight line through them. To plot the line, you can choose any two values of x and find the corresponding values of y using the equation.

Let's choose x = 0 and x = 5.

When x = 0: y = (4/5)(0) + 3 = 3, so one point is (0, 3).

When x = 5: y = (4/5)(5) + 3 = 7, so another point is (5, 7).

Plot these two points and draw  straight line through them.

Now, to shade the region that satisfies the inequality, choose a point that is not on the boundary line. The easiest point to choose is (0,0). Substitute  x and y values of this point into  inequality.

4x - 5y ≤ -15

4(0) - 5(0) ≤ -15

0 ≤ -15

Since this is not true, the point (0,0) is not in the region that satisfies the inequality. Shade the region above the boundary line to show the region that satisfies the inequality.

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This is untrue since the point (0,0) is not located in the area where the inequality is satisfied. To highlight the area that satisfies the inequality, shade the area above the boundary line.

What is Inequality?

An inequality is a comparison that shows that one value or expression is larger than, less than, or equal to another. Different algebraic methods, such as adding, subtracting, multiplying, or dividing both sides by the same amount, or factoring and determining the roots of the equations, can be used to resolve or simplify inequalities.

Plotting the inequality 4x - 5y ≤-15 can be done by doing the following:

To solve for y, rearrange the inequality first:

4x - 5y ≤ -15

-5y ≤ -4x - 15

y ≥ (4/5)x + 3

You are then provided with the boundary line's equation. Plot two points on a graph, then draw a straight line through them to represent this line. You can use the equation to determine the values of y that correspond to any two x values to plot the line.

Let's choose x = 0 and x = 5.

When x = 0: y = (4/5)(0) + 3 = 3, so one point is (0, 3).

When x = 5: y = (4/5)(5) + 3 = 7, so another point is (5, 7).

Plot these two spots and a line should be drawn directly between them.

Now select a point that is not on the border line to shade the area that satisfies the inequality. (0, 0) is the simplest position to select. In the inequality, replace the x and y values of this point.

4x - 5y ≤ -15

4(0) - 5(0) ≤ -15

0 ≤ -15

Since this is untrue, the point (0,0) is not located in the area where the inequality is satisfied. To highlight the area that satisfies the inequality, shade the area above the boundary line.

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50 Points! Multiple choice algebra question. Photo attached. Thank you!

Answers

Answer:

Step-by-step explanation:

D

Answer d is the correct one

How many times larger is the volume of a
cylinder if the radius is multiplied by 3?
A. 3 times larger
B. 6 times larger
C. 9 times larger
D. 27 times larger

Answers

When the radius of a cylinder is multiplied by 3, the volume of the cylinder is increased by a factor of 3^2 = 9, not 3.

The volume of a cylinder is given by the formula V = πr^2h, where r is the radius and h is the height. If we multiply the radius by 3, the new radius becomes 3r. So the new volume becomes:

V' = π(3r)^2h = 9πr^2h

Therefore, the new volume is 9 times larger than the original volume.

So, the correct answer is C. 9 times larger.

Answer:

C. 9 times larger

Explanation:

where, r = radius of a cylinder and h = height of the cylinder. This means that the volume of a cylinder will be 9 times larger if the radius is multiplied by 3.

According to a poll, 80% of Americans report being afflicted by stress. Suppose a random sample of 1,200 Americans is selected. Complete parts (a) through (d) below.
a. What percentage of the sample would we expect to report being afflicted by stress?

Answers

The percentage of the sample selected at random that would be expected to be afflicted by stress would also be = 80%

How to calculate the percentage afflicted by stress?

The percentage of a data set is when part of the data is represented per 100 with a symbol of %.

It was stated in the question that 80% of Americans report being afflicted by stress.

Therefore when a sample is randomly selected from an American population, the percentage that is expected to be afflicted by stress should also be 80%.

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Need help asap pls and thx pic is attached

Answers

The values of Sin A, Cos B and Tan A are: 41.8, 2.8 and 6.9 respectively

What is trigonometry ratio?

The ratios of the sides of a right triangle are called trigonometric ratios.", if in trigonometry the ratios of the sides of a triangle are called 'trigonometric ratios' then what if the triangle is not a right triangleA =

In triangle 1

SinA = Opposite/Hypothenuse

Son A = 6/9

Sin A = 0.6669

A = Sin ⁻¹0.6667

A = 41.8⁰

For triangle 2

Cos B = Adjacent /Hypothenuse

Cos 45 = x/4

AB = 4*0.7071

AB = 2.8

For triangle 3

Tan a = Opp/Adjacent

Tan60 = AB/4

AB = 4*Tan60

AB = 4* 1.7321

AB = 6.9

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The length of a rectangurlar frame is 15 inches and the width of the frame is 8 inches what is the length of the frame

Answers

the correct length of the frame is 17 inches.

What is a rectangle?

Rectangles are quadrilaterals having four right angles in the Euclidean plane of geometry. Various definitions include an equiangular quadrilateral, A closed, four-sided rectangle is a two-dimensional shape. A rectangle's opposite sides are equal and parallel to one another, and all of its angles are exactly 90 degrees. Area of rectangle is A = a*b

Based on the information given, it should be noted that the diagonal will be the longest side. Therefore, we'll use the Pythagoras theorem to solve the question.

This will be:

d² = 15² + 8²

d² = 225 + 64

d² = 289

d = ✓289

d = 17

Therefore, the correct option is 17 inches.

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(2x - 4)(5x + 8) what’s the answer

Answers

Answer:

10x^2 - 4x - 32

Step-by-step explanation:

(2x - 4)(5x + 8)

10x^2 + 16x - 20x - 32

10x^2 - 4x - 32

offering 15 points please help

Answers

Answer: p=[tex]\frac{4m}{3}[/tex]  last one

Step-by-step explanation:

Varies directly means y=kx

here p=km

m= 1 1/2 =3/2

p=2

plug to solve for k

2=k(3/2)

k=4/3

plug back in p=4m/3

Suppose you work for a company that manufactures electronics. The development analysts estimate that 1% of their flagship product will fail within 2 years of the purchase date, with a replacement cost of $ 1300.

A newly hired associate at the company proposes to charge $ 5 for a 2 year warranty.

Answers

The company can expect to earn $5 per product sold if they offer a warranty, compared to an expected loss of $13 per product sold if they do not offer a warranty. It is a profitable decision for the company to offer the warranty.

What is binomial distribution?

In a binomial probability distribution, the number of "Successes" in a series of n experiments is represented as either success/yes/true/one (probability p) or failure/no/false/zero (probability q = 1 p), depending on the outcome's boolean value.

Assuming that the failure of the flagship product follows a binomial distribution with a probability of 1% of failure within 2 years of purchase, let's calculate the expected cost to the company without a warranty and with the warranty.

Without the warranty, the expected cost to the company is given by:

Expected cost without warranty = 0.01 x $1300 = $13

With the warranty, the expected cost to the company is given by:

Expected cost with warranty = $5 - (0.99 x $0) = $5

Therefore, the company can expect to earn $5 per product sold if they offer a warranty, compared to an expected loss of $13 per product sold if they do not offer a warranty. It is a profitable decision for the company to offer the warranty.

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Find the surface area
Will give branliest

Answers

The surface area of the square base pyramid is 138 inches².

How to find the surface area of a pyramid?

The pyramid above is a square base pyramid. The surface area of the pyramid can be calculated as follows:

Therefore,

surface area of the pyramid = base area + 2al

where

a  = base lengthl = height of the pyramid

Therefore,

a = 6 inches

l = 8.5 inches

Hence,

base area = 6² = 36 inches²

a = 6 inches

l = 8.5 inches

Therefore,

surface area of the pyramid = 36 + 2 × 6 × 8.5

surface area of the pyramid = 36 + 102

surface area of the pyramid = 138 inches²

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Please help me with this due tomorrow

Answers

Answer:

Step-by-step explanation:

you have to match the numbers on the lines of the plane, they have to match up with each other it goes (x,y) the x line is the one going to the side, and the y is the one going up to down

Describe the association shown in the scatter plot.

A. No association

B. Negative association

C. Prime association

D. Positive association

In my opinion I think it’s either B or D but what do you guys think?

Answers

Answer:

B.

Step-by-step explanation:

Since the line is from the top left to bottom right it's negative but if it was the opposite it would be positive.

Solve the following equation for x, giving your answer in the form lnp/lnq

2 × 5^(3x+2) = 6 x 7^(1-2x)

Answers

Answer:

[tex]x=\dfrac{\ln \left(\frac{21}{25}\right)}{\ln 6125}[/tex]

Step-by-step explanation:

Given equation:

[tex]2 \cdot 5^{3x+2} = 6 \cdot 7^{1-2x}[/tex]

Divide both sides of the equation by 2:

[tex]\implies 5^{3x+2} = 3 \cdot 7^{1-2x}[/tex]

Take natural logs of both sides:

[tex]\implies \ln \left(5^{3x+2}\right) = \ln \left(3 \cdot 7^{1-2x}\right)[/tex]

[tex]\textsf{Apply the product law:} \quad \ln xy=\ln x + \ln y[/tex]

[tex]\implies \ln 5^{3x+2} = \ln 3 + \ln 7^{1-2x}[/tex]

[tex]\textsf{Apply the power law:} \quad \ln x^n=n \ln x[/tex]

[tex]\implies (3x+2)\ln 5 = \ln 3 + (1-2x)\ln7[/tex]

Expand:

[tex]\implies 3x\ln 5+2\ln 5=\ln 3+\ln7-2x\ln7[/tex]

Collect the terms in x on the left side and the constants on the right side of the equation:

[tex]\implies 3x\ln 5+2x\ln7=\ln 3+\ln7-2\ln 5[/tex]

Factor out the common term x on the left side:

[tex]\implies x(3\ln 5+2\ln7)=\ln 3+\ln7-2\ln 5[/tex]

[tex]\textsf{Apply the power law:} \quad n \ln x=\ln x^n[/tex]

[tex]\implies x(\ln 5^3+\ln7^2)=\ln 3+\ln7-\ln 5^2[/tex]

Simplify:

[tex]\implies x(\ln 125+\ln 49)=\ln 3+\ln7-\ln 25[/tex]

[tex]\textsf{Apply the product law:} \quad \ln x + \ln y=\ln xy[/tex]

[tex]\implies x(\ln (125 \cdot 49))=\ln (3\cdot 7)-\ln 25[/tex]

[tex]\implies x(\ln 6125)=\ln 21-\ln 25[/tex]

[tex]\textsf{Apply the quotient law:} \quad \ln x - \ln y=\ln \left(\dfrac{x}{y}\right)[/tex]

[tex]\implies x(\ln 6125)=\ln \left(\dfrac{21}{25}\right)[/tex]

Divide both sides of the equation by ln 6125:

[tex]\implies x=\dfrac{\ln \left(\frac{21}{25}\right)}{\ln 6125}[/tex]

Carla and Hattie are playing a game and trying to decide who will start first. Which method assures that each of them has a fair chance of being selected to go first? Flip a fair coin. If it lands on heads, Carla will go first. If it lands on tails, Hattie will go first. Create a spinner with four equal-sized regions. Color each region a different color: red, green, blue, and purple. If the spinner lands on red, Carla will go first. If the spinner lands on green, Hattie will go first. If the spinner lands on blue, Carla will go first. If the spinner lands on purple, spin again. Roll a number cube with numbers from 1 to 6. If the number rolled is greater than 4, Carla will go first. Otherwise, Hattie will go first. Draw a card from an ordinary deck of 52 playing cards. If the drawn card is a club, Hattie will go first. If the drawn card is a diamond, Carla will go first. If the drawn card is a heart, Hattie will go first. If the drawn card is a spade, draw again.

Answers

The selection method that assures a fair chance of being selected to go first between Carla and Hattie is A) Flip a fair coin. If it lands on heads, Carla will go first. If it lands on tails, Hattie will go first.

What is a fair chance?

A fair chance is based on an equal probability of being selected.

A fair coin of head and tail offers a fair chance to two contenders on who should play the game first.

In this situation, since Carla gets the heads, he has 50% chance of being selected to go first.

Equally, Hattie has a 50% chance to go first getting the tails.

Thus, the correct selection method is Option A.

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Y=2X squared -12 X +20 for quadratic formula

Answers

x = (12 ± √(-16)) / 4,The solutions would be complex numbers.

What is the quadratic formula?

To solve quadratic equations of the form ax2 + bx + c = 0, use the quadratic formula. For this situation, your condition is as of now as a quadratic condition, with a = 2, b = - 12, and c = 20.

The quadratic formula is:

x = (-b ± √[tex](b^2 - 4ac)[/tex]) / 2a

Plugging in the values for a, b, and c, we get:

x = (-(-12) ± √[tex]((-12)^2 - 4(2)(20)))[/tex] / 2(2)

Simplifying the expression inside the square root:

x = (12 ± √[tex](144 - 160)[/tex]) / 4

x = (12 ± √(-16)) / 4

Since the square foundation of a negative number is definitely not a genuine number, this condition has no genuine arrangements. Complex numbers would provide the answers.

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there are 40 students in ms. vitales wednesday night aerobics class of the 40 students 30% are african american 45% are caucasian and the rest are hispanic how many of the students in the aerobics class are hispanic

Answers

Hence ,10 Hispanic students in Ms. Vitals Wednesday night aerobics class.

What is the aerobics class?

Aerobics is a form of physical exercise that combines rhythmic aerobic exercise with strength and stretching training routines with the goal of improving all elements of fitness ( cardio-vascular fitness, flexibility and muscular strength ).

How to find percentage?

The percentage  can be  found by  dividing the  value by the total value and then multiplying the  result by 100. The formula  used to  calculate  the  percentage is: [tex]\frac{value}{total value}[/tex]×100%.

To find out  how many of the  students in Ms.  Vitals aerobics class are Hispanic,

first of all to determine  the percentage of students  are not African American or Caucasian.

The percentage  of students are African American is 30%, and the percentage are Caucasian is 45%. Therefore, the percentage of students are not African American or Caucasian is;

100% - 30% - 45% = 25%

So, 25% of  the students in the aerobics class are Hispanic.

To find the number of students are Hispanic,  we need to calculate 25% of the total number of  students;

25% of 40 students = [tex]\frac{25}{100}[/tex] x 40 = 0.25×40=10 students

Therefore, there are 10 Hispanic students in Ms. Vitals Wednesday night aerobics class.

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In one of the rental parking lots at rent-and-save auto, there are 5 trucks, 9 cars, and 1 van. What is the probability that a randomly selected vehicle from this lot would be a car?

Answers

The probability of selecting a car from the rental parking lot is 0.6 or 60%.

What is a probability?

Probability of selection refers to the likelihood or chance of selecting a particular item or event from a group or population. It is a mathematical concept used in statistics, mathematics, and science to describe the likelihood of an event occurring, given the set of possible outcomes.

The probability of selecting a car from the rental parking lot can be found by dividing the number of cars by the total number of vehicles:

P(Car) = Number of Cars / Total Number of Vehicles

In this case, there are 5 trucks, 9 cars, and 1 van, so the total number of vehicles is:

Total Number of Vehicles = 5 + 9 + 1 = 15

Number of Cars = 9

Therefore, the probability of selecting a car from the rental parking lot is:

P(Car) = Number of Cars / Total Number of Vehicles

           = 9 / 15

           = 3 / 5

            = 0.6

So the probability of selecting a car from the rental parking lot is 0.6 or 60%.

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