HELLPP IM CONFUSED :(

- 8/9 - (-2/9)

The answer I have gotten is -6/9

Answer: The number of blue marbles in the sample is 11, so the proportion of blue marbles in the sample is 11/20. If the sample is representative, we can use this proportion to estimate the proportion of blue marbles in the whole bag of 950 marbles. So, our estimate of the number of blue marbles in the whole bag is:

950 * (11/20) = 477.5

So, we can estimate that about 478 marbles out of 950 are blue.

Step-by-step explanation:

The power of the snow machine is 10,000 Joules per second.

power is simply the amount of energy transferred or converted per unit time.

It is expressed as;

P =  work-done / time

P = ( force × displacement ) / time.

Given the data in the question;

Plug the given values into the above formula and solve for P.

P = ( 1000N × 1000m ) / 100s

P = ( 1000000Nm / 100s

P = 10,000 Nm/s

P = 10,000 J/s

Therefore, the power of the machine is  10,000 J/s.

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Both of these are correct. When multiplying 32 and 8, we should follow these steps:

So, the correct answer is 256.

Here is the multiplication shown step-by-step:

 32
   8

 16 --> drop down 6 and carry the 1

1
32
   8

   6

24-   --> drop down the 4 and add 1; carry the 2

 56

2

 32
    8

   6

 5 -

2 - - --> drop down the 2 since no more digits available to multiply

256 --> the answer

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Based on the given simultaneous equation, the value of x=-4  whereas the value of   y=-7

Two or more algebraic equations that share variables, such as x and y, are referred to as simultaneous equations.

Because the equations are solved simultaneously, they are referred to as simultaneous equations.

Here are some examples of simultaneous equations:

2x + 4y = 14

4x 4y = 4

6a + b = 18

4a + b = 14

3h + 2i = 8

2h + 5i =10

Each of these equations could have an infinite number of solutions.

However, if we have at least as many equations as variables, we may be able to solve them using simultaneous equations methods.

So, given

{y=−2x+1

{4x+y=9

-4x+y=9     get y alone

add 4x both sides

y=4x+9

insert into y=2x+1

2x+1=4x+9

subtract 1 both sides

2x=4x+8

subtract 4x both sides

-2x=8

divide by -2

x=-4

y=2x+1

y=2(-4)+1

y=-8+1

y=-7

check

-4(-4)+(-7)=9

16+(-7)=9

9=9

x=-4

y=-7

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Answer:

Answers are below ----v

Step-by-step explanation:

1. Clockwise

2. 3

3. (y, -x)

4. (3x,3y)

A right isosceles triangle is a triangle with a right angle (90 degrees) and two sides that are equal in length. This means that the triangle is also a special case of an isosceles triangle where the two equal sides are adjacent to the right angle.

To identify a right isosceles triangle among a group of shapes, you should look for the shape that has a right angle and two sides of equal length. One way to check for the right angle is to look for a corner that forms a square angle (i.e., 90 degrees), and one way to check for the equal sides is to compare the length of each side.

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The following question may be like this:

What is a right isosceles triangle?

Based on the information and the dimensions of the scaled figure, we can infer that the dimensions of the actual figure are 2.1 meters by 3.9 meters.

To calculate the measures of the original figure we must apply a rule of three. In this case, the logic that we must use is: if 2 centimeters are equivalent to 1 meter, how much is 4.2 cm and 7.8 cm respectively.

According to the above, the measurements of the original figure are: 2.1 meters by 3.9 meters.

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The exponential function that best models the number of game systems sold, in million, x years since 2015 is given as follows:

y = 30.5(0.7)^x.

The standard definition of an exponential function is given as follows:

y = ab^x.

In which:

Considering the graph, the parameters for this problem are given as follows:

Hence the function is defined as follows:

y = 30.5(0.7)^x.

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The probability that at least one pair of people have the same birthday, with 30 people in a classroom is approximately 0.7063.

To solve this problem, we can use the concept of the complement of an event. The complement of the event "at least one pair of people have the same birthday" is the event "no pair of people have the same birthday." So, we can find the probability of this complement event and subtract it from 1 to get the probability of the original event.

The probability that the first person has a unique birthday is 1, since there are no other people in the room yet. The probability that the second person also has a unique birthday is (364/365), since there are 364 remaining days in the year that they could be born on.

Similarly, the probability that the third person has a unique birthday is (363/365), and so on, down to the 30th person, whose probability of having a unique birthday is (336/365).

To find the probability that no pair of people have the same birthday, we can multiply these probabilities together:

P(no pair share a birthday) = 1 * (364/365) * (363/365) * ... * (336/365) ≈ 0.2937

Therefore, the probability that at least one pair of people have the same birthday is:

P(at least one pair share a birthday) = 1 - P(no pair share a birthday) ≈ 1 - 0.2937 = 0.7063

So the probability that at least one pair of people have the same birthday is approximately 0.7063, which is quite high. This is known as the birthday problem or birthday paradox.

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The standard deviation of the population is approximately 11.8 ounces.

Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.

The formula to find the standard deviation is given

σ = √( Σ(x - μ)² / N )

where  μ is the mean.

μ = (94 + 113 + 93 + 123 + 93 + 102) / 6 = 100

Next, we can calculate the deviations of each value from the mean:

94 - 100 = -6

113 - 100 = 13

93 - 100 = -7

123 - 100 = 23

93 - 100 = -7

102 - 100 = 2

σ = √( -6)²+( 13)²+( -7)²+( 23)² +( -7)²+( 2)²/ 6 )

=√36+169+49+529+49+4/6

=√836/6=11.8

Hence, the standard deviation of the population is approximately 11.8 ounces.

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The probability of Nishtha using Rs 5 coin is  [tex]\frac{1}{4}[/tex] , if she needs to pay for a pencil Rs 4.

P(E) = number of favorable outcomes / total number of outcomes

Denominations of coins = ₹1, ₹2, ₹5 and ₹10 each

Total number of coins = 4

Coins that can pay the amount = ₹5 and ₹10

Number of Favorable Outcomes = 2

For the probability of using two coins :-

P(E) = [tex]\frac{2}{4} = \frac{1}{2}[/tex]

we have to find the probability of using ₹5 coin. And here the probability of using of ₹5 coin and ₹10 coin are equal likely. So using of ₹5 coin is 50% of the probability of using both coin

P(rs5) = [tex]50\% \times \frac{1}{2}[/tex]

         = [tex]\frac{1}{4}[/tex]

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The length of Mr. Neil's homeroom is (10/11) times the length of Miss Robert's homeroom.

The length of Mr. Neil's homeroom is calculated as follows:

Let's assume that Miss Robert's homeroom has width w and length l, and Mr. Neil's homeroom has width (1¹/₁₀ or 11/10)w and length x.

Both homerooms have the same perimeter, therefore:

2w + 2l = 2(11/10)w + 2x

Simplifying the equation:

2l - 2x = (2/10)w

l - x = (1/10)w

x = l - (1/10)w

To solve for x, we need to express it in terms of l and w.

From the equation above, we can substitute x with l - (1/10)w:

(11/10)w = 2l - x

(11/10)w = 2l - l + (1/10)w

(10/10)w = l + (1/10)w

w = (10/11)l

Substituting w with (10/11)l in the expression for x, we get:

x = l - (1/10)(10/11)l

x = l - (1/11)l

x = (10/11)l

Therefore, the length of Mr. Neil's homeroom is (10/11) times the length of Miss Robert's homeroom.

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Answer:

9.09%

(⬇Read my notes⬇)

Notes:

Hi there,

I know this answer is going to be incorrect on RSM, but it is the correct answer. Everyone has been saying that it's 9.09%, and I even found that as well. So I don't know why RSM is saying that it's wrong, because it should be correct.

- 201600823

Step-by-step explanation:

173 bagels left after the first hour.

Answer:

-7

Step-by-step explanation:

Answer: -7

Step-by-step explanation: I hope this helped you out!!!! Please mark me as brainiest.

The volume of the solids A and C will be 1,125 cubic km and 4.608 cubic km, respectively.

Dilation is the process of increasing the size of an item without affecting its form. Depending on the scale factor, the object's size can be raised or lowered.

Solid A is dilated using a scale factor of 2/5, resulting in Solid B. Then the volume of solid A is given as,

(Scale factor)³ x (Volume of solid A) = Volume of solid B

(2/5)³ x Volume of solid A = 72

Volume of solid A = 1,125 km³

Solid B is also dilated using a scale factor of 2/5, resulting in Solid C. Then the volume of solid C is given as,

(Scale factor)³ x (Volume of solid B) = Volume of solid C

(2/5)³ x 72 = Volume of solid C

Volume of solid C = 4.608 km³

The volume of the solids A and C will be 1,125 cubic km and 4.608 cubic km, respectively.

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The company must make 100 X-ray machines to minimize the unit cost.

A differential equation is an equation that contains one or more functions with its derivatives.

To minimize the unit cost, we need to find the value of x that minimizes the function C(x) = 0.9x² - 180x + 20985.

We can start by taking the derivative of C(x) with respect to x and setting it equal to zero:

C'(x) = 1.8x - 180 = 0

Solving for x, we get:

x = 100

Therefore, the company must make 100 X-ray machines to minimize the unit cost.

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The more accurate statement is that hypotheses are only as good as the observations on which they are based.

A hypothesis is a tested assertion regarding the relationship between two or more variables or a suggested explanation for some observable occurrence in a scientific setting.

As a result, hypothesis are only as good as the observations upon which they are built.

For instance, if we stay up late, we will be fatigued the next day. Turning off your phone allows it to charge more quickly. All of them are hypotheses since they are based on observations and are only valid for as long as the observations stay true.

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Answer: x = 4, y = -8

Step-by-step explanation:

Because 2 is a multiple of four, multiply the first equation by two to eliminate the x value and effectively isolate y.

4x - 4y = 48

4x + 7x = -40

If we were to subtract the x values, that gives us -11y = 88, or y = -8.

Then, just plug y into your equation of choice.

2x - 2(-8) = 24

2x + 16 = 24

2x = 8

x = 4

One way you can check whether the values is right is plug the y value into the other equation and see if you receive the same answer.

4x + 7(-8) = -40

4x = -40 + 56

4x = 16

x = 4

The equation of the line that is parallel to the line x = -2 and passes through the point (-5, 4) is x = -5.

A mathematical statement that equates two algebraic expressions is known as an equation. The equal to (=) sign appears between the expression and an equation.

Parallel lines are straight lines in the same plane that never cross each other.

The parallel lines have the same slope.

Given that,

Equation of the given line is x = -2

Any line parallel to this line will be in the form x = K, where K is a constant.

The line will pass through ( -5 , 4).

The line x = K will satisfy the point ( -5 , 4)

-5 = K

x = -5

Hence, the equation of the line that is parallel to the line x = -2 and passes through the point (-5, 4) is x = -5.

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The program to cost of each container and the total cost of producing all the containers is given below.

The program based on the information will be:

#include <iostream>

using namespace std;

int main() {

int r,h,c,n;

cout<<"Enter the base radius : ";

cin>>r;

cout<<"\nEnter the height : ";

cin>>h;

cout<<"\nEnter the cost per square cm : ";

cin>>c;

cout<<"\nEnter the number of containers : ";

cin>>n;

int s_area = (3.14*r*2)+(2*3.14*r*h);

int cost = c*s_area;

int t_cost = n*cost;

cout<<"\nCost of each container : "<<cost<<endl;

cout<<"Total cost : "<<t_cost<<endl;

}

Based on the above, we've created a program to take the radius of the base, the height of the container, the cost per square centimeter of the material cost.

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A manufacturer wishes to determine the cost of producing an open-top cylindrical container. The surface area of the container is the sum of the area of the circular base plus the area of the outside (the circumference of the base times the height of the container). Create C program to take the radius of the base, the height of the container, the cost per square centimeter of the material (cost), and the number of containers to be produced (quantity). Calculate the cost of each container and the total cost of producing all the containers.

The graph of g(x) = (x - 2)^3 + 7 is a transformation of the parent function f(x) = x^3.

The parent function f(x) = x^3 has a shape that is symmetrical about the origin and increases as x moves away from the origin. The graph of g(x) = (x - 2)^3 + 7 is also symmetrical about the origin, but it has been translated 2 units to the right and 7 units up from the parent function.

So, the graph of g(x) = (x - 2)^3 + 7 is similar in shape to the parent function f(x) = x^3, but it is shifted to the right and up on the coordinate plane.

The combinations that are more affected by extreme observations are mean and standard deviation, while the combinations that are less affected are median and IQR.

The mean is more affected by extreme observations, because it takes into account the value of every observation in the data set, whereas the median only considers the middle value(s) and is therefore less sensitive to extreme values.

The standard deviation is more affected by extreme observations, because it takes into account the difference between each observation and the mean of the data set. A single extreme value can have a large impact on the mean, and therefore on the standard deviation.

On the other hand, the interquartile range (IQR) is less affected by extreme observations, because it only considers the range of the middle 50% of the data. The median and IQR are often used together to describe a data set that has extreme values or is not normally distributed.

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Approximately 70 miles separated Harold's home at his grandparents' home from his own home. Accordingly, Harold travelled the following distance overall on his birthday: 70 + 74.46 + 70 ≈ 214.46

What is a distance? . Regardless of the start or end point, distance can be defined as the amount of space object has to cover.

The metre serves as the SI unit of distance (m). Centimeters (cm) are a common unit of measurement for short distances, whereas kilometres (km) are used for longer distances (km). You could measure a piece of paper's length in centimetres, for instance, by measuring from the bottom to the top.

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Answer:

(-1,3) and (3,-5)

Step-by-step explanation:

I'm assuming since it is giving no information that it wants where the two graph intersect each other.

So, by the looks of it they intersect at

(-1,3) and (3,-5)

The measure of angle NOP is found by solving an equation that is obtained by using the fact that the sum of the angles in a triangle is 180 degrees. The solution is m∠NOP to obtain the answer of 53.13 degrees.

In the problem, we are given a triangle NOP, where \overline{NP} is extended through point P to point Q. We are given the measures of three angles: m∠OPQ, m∠PNO, and m∠NOP.

We are asked to find the measure of angle NOP.To find the measure of angle NOP, we can use the fact that the sum of the angles in a triangle is always 180 degrees. So, we add up the measures of the three angles we know:

m∠OPQ + m∠PNO + m∠NOP = 180

We are given the measures of m∠OPQ, m∠PNO, and m∠NOP in terms of x. We substitute these values and get an equation in terms of x:

(9x-19) + (2x+5) + (3x+16) = 180

Simplifying the left side of the equation, we combine like terms:

14x + 2 = 180

We can then isolate x by subtracting 2 from both sides of the equation:

14x = 178

And then we can solve for x by dividing both sides of the equation by 14:

x = 12.71

Now that we know x, we can use it to find the measure of angle NOP, which is what we were asked to do. We substitute x = 12.71 into the equation for m∠NOP:

m∠NOP = 3x + 16 = 3(12.71) + 16 = 53.13

Therefore, the measure of angle NOP is 53.13 degrees.

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The two points that a line of fit will go through to best fit the data are;

B: ( 3, 7) and (9, 1)

Scatter plots are defined as the graphs that present the relationship between two variables in a data-set. It is used to represent data points on a two-dimensional plane or on a Cartesian system. The independent variable or attribute is plotted on the X-axis, while the dependent variable is plotted on the Y-axis.

A line of best fit is a straight line drawn through the maximum number of points on a scatter plot. It should have an equal number of points above and below that line. This is best represented on the blue line on the attached graph. It touched 4 points and is between the green and red line.

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