PLEASE HELP!!!!!!!!! DO NUMBER 7 AND EXPLAIN HOW YOU GOT THE ANSWER!!!!!!!!!!

Answer:

21.920

Step-by-step explanation:

The χ2 value corresponding to a right-hand tail area of 0.025 with 11 degrees of freedom is approximately 21.92.

It is a branch of mathematics that deals with the occurrence of a random event.

A Chi-square distribution is a probability distribution that is used in statistical analysis.

It is typically used to determine whether there is a significant difference between two sets of data.

The degrees of freedom for a Chi-square distribution is the number of independent variables in the data.

The χ2 value is used to determine the likelihood of obtaining a particular result from a Chi-square test.

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Answer:

x-5(x-1)=x(-2x3)

x-5x+5=-5x

-4x+5=-5x

-4x+5-5=-5x-5

-4x+5x=-5x+5x-5

Step-by-step explanation:

Answer:

5

Step-by-step explanation:

a) The probability of failing to meet the specification limit of 45-pounds tensile strength 15.87%.

b) The number of parts that would not meet the specification is 7,935.

a) Given that the tensile strength of a metal part is normally distributed with mean 40 pounds and standard deviation 5 pounds.

We have to find the probability of failing to meet the specification limit of 45-pounds tensile strength.

Using the standard normal distribution, we can find the probability of failing to meet the specification limit of 45 pounds as follows:

z = {45 - 40}/{5}

= 1

The probability of failing to meet the specification limit of 45 pounds is the probability that the standardized variable Z is greater than 1, which is given by:

P(Z > 1) = 0.1587

Therefore, the probability of failing to meet the specification limit of 45-pounds tensile strength is 0.1587 or 15.87%.

b) If the probability of failing to meet the specification is 0.1587, the probability of meeting the specification limit is

1 - 0.1587 = 0.8413

.If 50,000 parts are produced, then the expected number of parts that meet the specification limit is:

0.8413* 50,000 =  42,065.

Therefore, the number of parts that would not meet the specification is: 50,000 - 42,065 = 7,935.

Hence, about 7,935 parts would not meet the specification.

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Answer:

3

Step-by-step explanation:

the vector somewhat looks like this:

 ^

_\|_             the angle is 135 degrees, and the x component is -3

    |               To find the y component given the direction angle and x component, use the formula y_comp = tan(angle) * x_comp

tan (135 degrees) * -3 = 3

You can also use the graph and geometry, but that method is not recommended for beginners as it is very easy to make a mistake. The graph should be used to check if your answer makes sense.

Answer:

comic books = 2

magazines = 15

Step-by-step explanation:

Let c = number of comic books bought

Let m = number of magazines bought

He bought 17 items, so

c + m = 17

Comic books cost $4 each and magazines cost $3 each.

He spent $53 on comic books and magazines, so

4c + 3m = 53

Rearrange c + m = 17 to make m the subject:

m = 17 - c

Substitute  m = 17 - c  into  4c + 3m = 53  and solve for c:

4c + 3(17 - c) = 53

⇒ 4c + 51 - 3c = 53

⇒ c = 2

Substitute c = 2  into m = 17 - c to and solve for m:

m = 17 - 2 = 15

If you have a required return of 6% per year, compounded monthly, and you are offered an investment that will pay you $800 a month for 40 years, you would be willing to pay approximately $206,595.71 for this investment.

To determine the value you would be willing to pay for this investment, we can use the concept of present value. The present value of an investment is the current worth of the future cash flows it will generate. In this case, the investment will pay you $800 a month for 40 years.

To calculate the present value, we can use the formula:

\(PV = CF / (1 + r)^n\)

Where PV is the present value, CF is the cash flow, r is the required return per period, and n is the number of periods.

In this case, the cash flow is $800 per month, the required return is 6% per year (or 0.06/12 = 0.005 per month), and the number of periods is 40 years * 12 months = 480 months.

Plugging these values into the formula, we have:

PV = $800 / \((1 + 0.005)^(480)\)

Calculating this expression, we find that the present value is approximately $206,595.71. Therefore, you would be willing to pay approximately $206,595.71 for this investment to achieve your required return of 6% per year, compounded monthly.

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The least refractive index that a right-angle prism must have to reflect light through an angle of 90 degrees is 1.414.

The refractive index of a given material at two particular wavelengths depends on the composition of the material. Generally, the refractive index is measured using a spectrometer or a refractometer.

The measurements of the refractive index at two particular wavelengths would be specific to the material being measured, and the exact values depend on the exact composition of the material.

The refractive index (n) of a material is a measure of how much the material affects the speed of light passing through it. The least refractive index of a material is 1, which is the refractive index of a vacuum.

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Answer:

\(x=4+2\sqrt{3}\)

\(x=4-2\sqrt{3}\)

Step-by-step explanation:

Completing the square

when  \(ax^2+bx+c=0\)

Given equation:

\(3x^2-24x+40=28\)

Subtract 40 from both sides:

\(\implies 3x^2-24x=-12\)

Divide both sides by 3:

\(\implies x^2-8x=-4\)

Add the square of half the coefficient of \(x\) to both sides:

\((\frac{b}{2})^2=(\frac{-8}{2})^2=16\)

\(\implies x^2-8x+16=-4+16\)

Factor the left side and simplify the right side:

\(\implies (x-4)^2=12\)

Square root both sides:

\(\implies x-4=\pm\sqrt{12}\)

Add 4 to both sides and simplify the radical:

\(\implies x=4\pm\sqrt{4 \cdot 3}\)

\(\implies x=4\pm\sqrt{4}\sqrt{3}\)

\(\implies x=4\pm2\sqrt{3}\)

The probability that he hits will a bulls eye with at least one of his next three shots is 98.43%.

Given that a marksman can hit a bull eyes from 100 m three times out of every four shots, to determine what is the probability that hits will a bulls eye with a least one of his next three shots, the following calculation must be performed:

Therefore, the probability that he hits will a bulls eye with at least one of his next three shots is 98.43%.

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The number of adults believes that the divorce is morally wrong is given by 54.8 million.

Given that the total number of adults in the country is = 274 million

Percentage of adults believe that the divorce is morally wrong is given by = 20 %

So the probability of adults believes that the divorce is morally wrong is given by = 20 / 100 = 1 / 5.

The number of adults believes that the divorce is morally wrong is given by

= (Number of total adults) * (Probability of adults believes that the divorce is morally wrong)

= 274 million * (1 / 5)

= 54.8 million

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The question is incomplete. The complete question will be -

"If there are 274 million adults in the country, and 20% believe that the action is morally wrong. How many believe that divorce is morally wrong?"

The conversion of a fraction number with denominator 5 and numerator 2 , 2/5 in decimals is equals to the 0.4 value.

A decimal number can be defined as a number whose whole number part and fractional part are separated by a decimal point. Writing 2/5 as a decimal number by converting the denominator to powers of 10. We multiply the numerator and denominator by a number so that the denominator is a power of 10.

2/5 = (2 × 2) / (5 × 2) = 4/10

Now move the decimal point to the left as many places as there are zeros in the denominator, which is a power of 10.

The decimal moved one place to the left because the denominator was 10. Therefore, 4/10 = 0.4. Hence, required value is 0.4.

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Answer:

D. 15/√346

Hope this helps! Have a nice day :)!

Answer:

Step-by-step explanation:

The sum of the measures of the angles of a triangle is 180°.

m<D + m<E + m<F = 180°

4x + 2x + m<F = 180

What is the measure of <F? It's not clear in the post.

With the help of the figure we can say that triangles are congruent by SAS Rule

What is Congruence of Triangle?

Triangle congruence: Two triangles are said to be congruent if all three of their corresponding sides are equal and all three of their corresponding angles are equal in size. These triangles can be moved, rotated, flipped, and turned to look exactly the same.

Solution:

By SAS rule, two triangles are said to be congruent if any two sides and the angle included between the sides of one triangle are comparable to the corresponding two sides and the angle included between the sides of the second triangle.

In given figure, sides AB= PQ, BC=QR and angle between AB and BC equal to angle between PQ and QR i.e. ∠B = ∠Q. Hence, Δ ABC ≅ Δ PQR.

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Answer:

Step-by-step explanation:

poop

125 kg to lbs is 275.577828 Pounds. To find out how many pounds are contained in 125 kilograms, multiply 125 by 2.205.

The kilogram (also known as the kilogram) is the SI's (International System of Units) unit of mass and has the unit sign kg. It is a unit of measurement that is widely used in research, engineering, and commerce across the globe. Its meaning is "1,000 grams." The second and the metre, both of which are founded on fundamental physical constants, are used to define the kilogram. This enables a metrology lab with the appropriate equipment to calibrate a mass measurement device, such as a Kibble balance, to determine a precise kilogram mass. The pound is a unit of weight that is commonly accepted in the imperial system of mass measurement (the gravitational force acting on any given object).

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Answer:

b

Step-by-step explanation:

Remove full rotations of  

2

π

until the angle is between  

0

and  

2

π

.

sin

(

5

π

6

)

Apply the reference angle by finding the angle with equivalent trig values in the first quadrant.

sin

(

π

6

)

The exact value of  

sin

(

π

6

)

is  

1

2

.

1

2

The result can be shown in multiple forms.

Exact Form:

1

2

Decimal Form:

0.5

The appropriate test for the researcher’s hypothesis is: D)A one-sample t-test for a population mean.

A one-sample t-test is a kind of test that is used to determine the level of difference between the population mean of an unknown variable and a given or known value.

In the given question, the goal is to determine the difference between the sample mean of the lengths and the mean of the salmon population. To attain this goal, the researcher should use the one-sample T-test. The number of the population, the standard deviation, the sample mean and hypothesized mean are all markers for this test.

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Answer:  i dont really knw much bout this but i think its 22.71563

Step-by-step explanation:

Calculates c, ∠B, and ∠A based on given b, a, and ∠C.

c = √b2 + a2 - 2ba·cos(C) = 22.71563

∠B = arccos(

c2 + a2 - b2

2ca

)

= 0.39114 rad = 22.411° = 22°24'39"

∠A = arccos(

c2 + b2 - a2

2cb

)

= 1.70325 rad = 97.589° = 97°35'21"

Area =  

ab·sin(C)

2

= 112.5833

Perimeter p = a + b + c = 58.71563

Semiperimeter s =  

a + b +c

2

= 29.35782

Height ha =  

2×Area

a

= 8.66025

Height hb =  

2×Area

b

= 22.51666

Height hc =  

2×Area

c

= 9.91241

Median ma = √(a/2)2 + c2 - ac·cos(B) = 11.78983

Median mb = √(b/2)2 + a2 - ab·cos(C) = 23.89561

Median mc = √(c/2)2 + b2 - bc·cos(A) = 16.09348

Inradius r =  

Area

s

= 3.83487

Circumradius R =  

a

2sin(A)

= 13.11488

Answer:  large values of one variable are associated with small values of the other

Step-by-step explanation:

-1016 is a rational number and integer

Integers are basically the whole numbers that can be positive, negative, or zero. In integers, fractional numbers are not included. For instance, -2, -3,0,1,5, and so on are integers.

A rational number, in Mathematics, can be defined as any number which can be represented in the form of p/q where q ≠ 0.

Example of rational numbers are 1/2 , 2/1 , 3/5 e.t.c.

All positive and negative integers are also rational numbers.

Therefore the number -1016 is a both a rational number and an integer.

This is because all positive and negative numbers are integers.

And -1016 can be written as -1061/1 which makes it a rational number.

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Answer:

(-4,-9)

Step-by-step explanation:

vertex form: y=a(x-h)^2+k

hk=vertex of x and y

inside parentheses=horizontal (opposite signs)

that’s why it’s -4 instead of 4 for h (x) while -9 stays the same since it’s not inside the parentheses

Answer:

-8,5

Step-by-step explanation:

8,5 because the "m" is 5 squares down and 8 squares to the right.

Averages are a useful tool for summarizing data and providing a general idea of the central tendency of a dataset. However, it is important to recognize that averages can have drawbacks and should not always be taken literally.

One of the main drawbacks of using averages is that they can be heavily influenced by outliers or extreme values in the dataset. These outliers can skew the average, making it a poor representation of the typical or average value in the dataset. For example, if a dataset includes a few very large values, the average may be much higher than what is typical for the majority of the data.

Another drawback of using averages is that they can mask important variation or patterns in the data. Averages provide a summary of the data, but they do not provide any information about the distribution or spread of the data. For example, two datasets with the same average may have very different distributions, one with a narrow range of values and the other with a wide range of values. Therefore, relying solely on averages can obscure important information about the data.

My understanding and perception of averages has changed as I have learned more about statistics and data analysis. While averages are still a useful tool for summarizing data, I now recognize the importance of considering other measures of central tendency and variability, as well as visualizing the data through graphs or charts. I also appreciate the importance of understanding the context and limitations of the data when interpreting averages. Overall, I have come to recognize that averages are just one tool in the data analyst's toolbox and should be used in conjunction with other techniques to gain a more complete understanding of the data.

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Answer:

X + Y = 3 Y = 1 X = 2

Step-by-step explanation:

A variable is always 1

Answer:

x is either 2 or 1 and y is either 1 or 2

Step-by-step explanation:

because the only equation that would fit this is 1 + 2  or 2 + 1 so... y would either be 2 or 1 .

Answer:

you have it correct sir

Step-by-step explanation:

Answer:

Do you have a picture example?

Step-by-step explanation:

Since Jacob is playing miniature golf, then the ball couldn't reach the hole in one shot, thus Jacob is correct.

Contingency is a statement in which there are some true and some false values for every value of its propositional variables.

Given that Jacob is playing miniature golf states that he cannot hit the ball from the start. then Bounce it off the back wall once And reach the hole in one shot.

So, we can write that the ball needs to bounce off the back wall once.

The ball can't  reach the hole in one shot so Jacob is correct.

It is impossible to hit the ball from the start,

Bounce it off the back wall once,

And reach the hole in one shot.

Therefore, Jacob is playing miniature golf, the Jacob is correct.

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