sierra read for 220 minutes 1 week. Chen read for 1/2 hour a day for 7 days which explanation is correct

Step-by-step explanation:

Find unit rate :

90 miles  in 1.5 hrs

90 /1.5 = 60 miles/hr

    that is one mile per minute     20 miles takes 20 minutes

            120 miles takes 120 minutes = 2 hours

No, we cannot conclude that there is a difference in the mean number of surgeries performed by hospital or by day of the week.

The data provided would need to be further analyzed to determine if there is a statistically significant difference between the means. A t-test or ANOVA could be used to test for differences between the means.

1. The data provided shows the number of outpatient surgeries performed at three hospitals in the Tulsa, Oklahoma, area on each day of the week.

2. To determine if there is a difference in the mean number of surgeries performed by hospital or by day of the week, a statistical test needs to be conducted.

3. A t-test or ANOVA could be used to test for differences between the means.

4. The results of the test would need to be examined to determine if there is a statistically significant difference between the means.

5. At the 0.05 significance level, we cannot conclude there is a difference in the mean number of surgeries performed by hospital or by day of the week.

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Answer:

  g(4a) = 8a^2 -20a +3.5

Step-by-step explanation:

Put 4a where x is and simplify.

  g(x) = 0.5x^2 -5x +3.5

  g(4a) = 0.5(4a)^2 -5(4a) +3.5

     = 0.5(16a^2) -20a +3.5

  g(4a) = 8a^2 -20a +3.5

Answer:

1.71 pounds of sugar per dollar.

Step-by-step explanation:

To calculate how many pounds of sugar Keisha got per dollar, we divide the total amount of sugar by the total amount of money spent. In this case, she bought 12 pounds of sugar for $7, so we divide 12 by 7:

12 ÷ 7 = 1.71

So, Keisha got 1.71 pounds of sugar per dollar.

a. The formula B = 703w/h^2 can be solved for w by rearranging the equation as w = B * h^2 / 703.
b. For a person who is 64 inches tall and has a body mass index of 21.45, the weight can be calculated by substituting the values into the formula w = B * h^2 / 703, where B is 21.45 and h is 64 inches.

a. To solve the formula B = 703w/h^2 for w, we can rearrange the equation to isolate w on one side of the equation. Multiply both sides of the equation by h^2, then divide both sides by 703. The resulting equation is w = B * h^2 / 703.
b. To find the weight of a person who is 64 inches tall and has a body mass index of 21.45, we can substitute the values into the formula w = B * h^2 / 703. In this case, B is 21.45 and h is 64 inches. Plugging these values into the equation, we get w = 21.45 * 64^2 / 703. Evaluating this expression will give us the weight in pounds.

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Answer:

c

Step-by-step explanation:

When 2 percent of cards is 22, then total number of cards that were sold is 1100.

In mathematics, a percentage is a number or ratio that represents a portion of 100. It is just one of a number of ways to represent a dimensionless relationship between two numbers; others include ratios, fractions, and decimals.

Percentages are frequently represented by writing the symbol "%" after a number. Additionally, you can denote them by appending "percent" or "pct" to the end of the number. For instance, the decimal 0.35, the fractions 35/100 and 7/20, and the percentage 35% can all be represented.

Given that 2% of cards is 22 cards, i.e.

2/100 = 22/x

2/100 = 22/x

2x = 100 × 22

2x = 2200

x = 2200/2

x = 1100

Thus, When 2 percent of cards is 22, then total number of cards that were sold is 1100.

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Answer:

When 2% of cards equals 22, the total number of cards sold is 1100.

What exactly is a percentage?

A percentage is a number or ratio that represents a portion of 100 in mathematics. It is one of several ways to represent a dimensionless relationship between two numbers, the others being ratios, fractions, and decimals.

The symbol "%" is commonly used to represent percentages after a number. You can also indicate them by appending "percent" or "pct" to the end of the number. The decimal 0.35, fractions 35/100 and 7/20, and percentage 35%, for example, can all be represented.

So, Given that 2% of cards equals 22. 

Explanation:

2/100 = 22/x

2/100 = 22/x

2x = 100 × 22

2x = 2200

x = 2200/2

x = 1100

Therefore, if 2% of cards equals 22, the total number of cards sold is 1100.

Answer:

1 5/8

Step-by-step explanation:

Answer:

Step-by-step explanation:The lateral surface area of a regular pyramid is the sum of the areas of its lateral faces.

The total surface area of a regular pyramid is the sum of the areas of its lateral faces and its base.

The general formula for the lateral surface area of a regular pyramid is L.S.A.=12pl

where p

represents the perimeter of the base and l

the slant height.  

A=384cmSQUARE

H=8CM

S=10CM

A=12CM

E=11.6619

R=6CM

V=384CM3

The equilibrium constant can be determined using the concentrations of reactants and products at equilibrium. In this case, the initial concentrations of substances A, B, and C are given as [A] = 0.50 M, [B] = 0.75 M, and [C] = 1.2 M, while the equilibrium concentration of C is [C] = 1.0 M.

The equilibrium constant, denoted as K, is defined as the ratio of the product of the concentrations of the products to the product of the concentrations of the reactants, each raised to the power of their stoichiometric coefficients. In this case, the balanced chemical equation is not provided, so we cannot directly calculate the equilibrium constant.

To determine the equilibrium constant, we need the balanced chemical equation representing the reaction. Once the balanced equation is available, we can determine the stoichiometric coefficients and calculate the equilibrium constant using the concentrations at equilibrium. Without the specific reaction, we cannot provide a numerical value for the equilibrium constant.

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Answer:

x=-3

Step-by-step explanation:

lets make the "?" to a "x"

2+x=-1

do the math and its x=-3

so that means 2+-3=-1

Answer:

? = -3

2 + -3 = -1

Step-by-step explanation:

You're adding negative 3 to positive 2 (2 + -3 = -1), which is the same thing as subtracting positive 3 minus positive 2 (2 - 3 = -1).

Hope this helps :)

Answer:

68

Step-by-step explanation:

Hey your so polite and it’s appreciated! First mark other side of angle (right) as 28. 180-56 = 124. Since other side is smaller don’t make it equal. So it has to be higher than 61. So it’s 68! hope this helps !

Answer:

I have no idea tbh I need help with this too

Step-by-step explanation:

PLEASE HELP!!!!!!!!!!!!!!!

Answer:

4/5 is a fraction. 0.8 in Percent 0.8 = (0.8 x 100)/100 = 80/100 = 80% 0.8 as a percent can be written 80%.

Step-by-step explanation: i hope this answer your question.

Answer:

The average speed is 800 km/h

Step-by-step explanation:

The first thing to do here is to completely write the speed in hours.

We have 9 hours 45 minutes

45 minutes in hours is 45/60 = 3/4 = 0.75

So 9 hours 45 minutes = 9.75 hours

The average speed mathematically = Total distance/ Total time

That would be;

7800/9.75 = 800 km/h

Answer:

y=-2/5x-2

Step-by-step explanation:

First, you put x to the other side of the equation so you get y alone, getting the equation of -5y=-2x+10. In order to just have y on one side, you need to divide the whole equation by -5. This leads to the final answer of y=-2/5x-2.

The equation of the straight line passing through the centroid of the triangle with vertices(2, 6), (-4, 3) and (2,-3) and parallel to the given straight line 2x + 5y = 3, is; y = -²/₅x + 2

We are given the coordinate of the vertices of the triangle as;

(2, 6), (-4, 3) and (2,-3)

Now, the formula to find the coordinates of the centroid of the triangle is; (x, y) = (x₁ + x₂ + x₃)/3, (y₁ + y₂ + y₃)/3

Thus, the coordinates of the Centroid is;

(x, y) = (2 + (-4) + (2))/3, (6 + 3 + (-3))/3

(x, y) = (0, 2)

The centroid is parallel to the line 2x + 5y = 3

Writing this in slope intercept form of y = mx + c gives;

5y = -2x + 3

y = -²/₅x + 3

Thus, the equation of the line passing through the centroid is;

y - 2 = -²/₅(x - 0)

y - 2 = -²/₅x

y = -²/₅x + 2

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Answer:

ooooo ma gawt I am not sure what to expect when I get a chance for the homework of science and your family and friends I am not in the class from the place to stay with you a E has E Roll I am a little while to get the best thing to you in a t shirt size I am a great

plz mark me brainliest

Answer:

  (x, y) = (6, 8) using linear combination

Step-by-step explanation:

The coefficients of the x-terms are opposites of each other (2 and -2), so the x-terms can be eliminated using a linear combination of the equations.

Adding the two equations together gives ...

  (2x -y) +(-2x +3y) = (4) +(12)

  2y = 16 . . . . . . . . simplify

  y = 8 . . . . . . . divide by 2

Substituting for y in the first equation gives ...

  2x -8 = 4

  x -4 = 2 . . . . . divide by 2

  x = 6 . . . . . . . add  4

The solution is (x, y) = (6, 8).

Penelope has, 52quarters, 104 dimes, 416 nickels, and 162 pennies.

A numerical expression is a mathematical statement written in the form of numbers and unknown variables. We can form numerical expressions from statements.

From the given information let, 'x' be the number of quarters,

Therefore, Dimes is 2x, Nickels is 8x and Pennies is 3x.

So, x + 2x + 8x + 4x = 780.

15x = 780.

x = 52, The number of quarters.

2×52 = 104, The number of Dimes.

8×52 = 416 Nickels.

3×52 = 162 Pennies.

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Cladograms are considered to be hypotheses because they depict possible evolutionary relationships variable between organisms based on their shared characteristics.

Cladograms are diagrams that depict the evolutionary relationships between organisms based on shared characteristics. They are used to illustrate the evolutionary history of organisms and to show how different species are related to each other. Cladograms are considered to be hypotheses because they are used to make inferences about evolutionary relationships and are based on the assumption that organisms with similar characteristics are more closely related. Cladograms are used to reconstruct the phylogeny of organisms and to identify new species or recent evolutionary changes. Cladograms provide a visual representation of how organisms are related and can be used to make predictions about how organisms may have evolved in the past and how they may continue to evolve in the future.

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The correct answer is option c) infinitely many solutions..

To solve the system of equations using the substitution method, we'll substitute the value of y from the second equation into the first equation and solve for x.

Given:

-6x + 2y = 8 ---(1)

y = 3x + 4 ---(2)

Substitute equation (2) into equation (1):

-6x + 2(3x + 4) = 8

Simplify:

-6x + 6x + 8 = 8

8 = 8

We obtained a true statement (8 = 8), which means the two equations are equivalent. This solution shows that the system has infinitely many solutions.

Therefore, the correct answer is option c) infinitely many solutions..

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The median for the students is 4 and the median for the teachers is 3 compares the medians of the data.

The dot plots display the number of siblings reported by two different groups: seventh graders and teachers at a local middle school. The students' dot plot shows varying numbers of dots above each value on the number line, indicating the frequency of students reporting that specific number of siblings. Similarly, the teachers' dot plot represents the number of teachers reporting each value.

Looking at the dot plots, it is evident that the students' distribution is skewed towards higher numbers of siblings, with the highest frequency above 2 and 3. Conversely, the teachers' distribution appears to be more spread out, with a peak around 4 and a decline towards higher numbers.

To determine the median, we identify the middle value in each distribution. In the students' dot plot, the middle value falls around 4, as there are equal numbers of dots on either side. In the teachers' dot plot, the median is around 3 since the distribution is more symmetrical.

Therefore, comparing the medians of the data, we can conclude that the median for the students is 4 and the median for the teachers is 3.

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Statistical quality control (SQC) can be applied in various industries such as manufacturing, healthcare, finance, and services to monitor and improve the quality of products or services.

SQC involves the use of statistical tools and techniques to analyze and interpret data to identify and address any issues related to quality control. Some of the common applications of SQC include process control, acceptance sampling, and control charts.

In manufacturing, SQC can be used to monitor the production process and ensure that products meet the desired quality standards. For example, control charts can be used to track the performance of a particular machine or process and identify any deviations from the expected values.

In healthcare, SQC can be applied to monitor patient outcomes and ensure that the quality of care is consistent across different healthcare providers. For example, statistical analysis can be used to identify any trends or patterns in patient data and improve the effectiveness of treatments.

Overall, SQC can be applied in any industry where there is a need to ensure that products or services meet the desired quality standards. It is a valuable tool for identifying and addressing any issues related to quality control and improving overall efficiency and effectiveness.

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The volume of the cuboid is 162 cubic centimeter.

Given that, a cuboid of side 3 cm.

We know that, the volume of a cube = a³.

So, volume of the cube is 3³=27 cubic centimeter

a) We know that, the volume of a cuboid = Length × Breadth × Height

Cuboid made with 6 of these cubes.

So, Length = 18 cm, Breadth = 3 cm and Height = 3 cm

Here, volume of cuboid = 18×3×3

= 162 cubic centimeter

b) Dimensions of cuboid of the base in the given figure are length = 12 cm, breadth = 3 cm and height = 3 cm

Surface area = 2(lb+bh+hl)

= 2(12×3+3×3+3×12)

= 2×81

= 192 square centimeter

Dimensions of cuboid of the top in the given figure are length = 9 cm, breadth = 3 cm and height = 3 cm

Surface area = 2(lb+bh+hl)

= 2(9×3+3×3+3×9)

= 2×63

= 126 square centimeter

Total surface area = 192+126

= 318 square centimeter

Therefore, the volume of the cuboid is 162 cubic centimeter.

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Answer:

10

Step-by-step explanation:

Answer:

13

Step-by-step explanation:

The volume of the pyramid can be calculated using the formula:

Volume = (1/3) * base area * height

The base area of the pyramid is equal to the area of one of the square sides, which is:

Base area = 12 in * 12 in = 144 in^2

Therefore, the volume of the pyramid is:

Volume = (1/3) * 144 in^2 * 14 in = 2,688 in^3

Each wax cube has a volume of:

Volume of a wax cube = 6 in * 6 in * 6 in = 216 in^3

To find out how many wax cubes Josiah needs, we can divide the volume of the pyramid by the volume of each wax cube:

Number of wax cubes = Volume of pyramid / Volume of each wax cube

Number of wax cubes = 2,688 in^3 / 216 in^3 = 12.4444...

Since we can't use a fraction of a wax cube, Josiah will need to use 13 wax cubes to make the candle.

Graph of f(x) = 3x - sin 4x is using method of adding y-coordinates is attached below.

What is graphing method by adding ordinates?

The function y = 3x - sin 4x is actually the sum of two functions, y = 3x and y = - sin 4x.

For every value in the domain, there is a corresponding value in the range so that the point (x, 3x - sin 4x) is on the graph of y = 3x - sin 4x.

According to the given question:

Follow these steps to graphing the function:

1. Open an Excel file. Label the first column "x-coordinates," the second column "y = 3x," the third column "y = -sin 4x," and the fourth column "y = 3x - sin 4x." Set each column to round to four decimal places.

2. Set up the first column to range from -2pi to 2pi by intervals of pi/4.

3. Fill in the second and third columns by utilizing the equations y = 3x and y = - sin 4x, respectively.

4. Fill in the fourth column by simply adding the second and third columns.

5. Graph y = 3x - sin 4x  by using the x-coordinates from column A and the y-coordinates from column D.

Check the attachment below for the required graph obtained after plotting the points.

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The number $330,000 represents the median income of the top 1%, and $675,000 represents the mean income of the top 1%.

In a strongly skewed right distribution, the mean income is generally greater than the median income. The mean is influenced by extreme values or outliers in the data, which pull the average towards higher values. On the other hand, the median represents the middle value of the data when it is arranged in ascending order, and it is less affected by extreme values. In this case, since the distribution is strongly skewed to the right, the mean income of $675,000 is higher than the median income of $330,000.

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