Answer:
Step-by-step explanation:
1. Angle 1 is equal to Angle 2, and angle two is equal to angle 4.
2. Angle 4 is 27 degrees.
Please give brainliest!
Use the given information to write an equation of a circle.
center at (0,0) , radius 6
The equation of the circle with radius 6 and center at (0 , 0) is x^2 + y^2 = 36.
The general form of the equation of circle is given by (x - h)^2 + (y - k)^2 = r^2, where (h , k) is the location of the center and r is the radius of the circle.
Given the radius and center of the circle, substitute these values to the general form of the equation of the circle.
(x - h)^2 + (y - k)^2 = r^2
where (h , k) = (0 , 0)
r = 6
(x - 0)^2 + (y - 0)^2 = 6^2
x^2 + y^2 = 36
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Let x be a discrete random variable. if pr(x<9) = 1/6, and pr(x>9) = 1/3, then what is pr(x=9)?
Answer: 1/2
Step-by-step explanation:
The probabilities must add to 1, so:
\(P(x < 9) +P(X=9)+P(X > 9)=1\\\\\frac{1}{6}+P(X=9)+\frac{1}{3}=1\\\\P(X=9)=\boxed{\frac{1}{2}}\)
This look like a lot I'm sorry no one probably can do this
Answer:
do what?
Step-by-step explanation:
Answer:
The answer is nothing
Step-by-step explanation:
there is nothing there therefor there is no answer
Kali made cookies for her study group. The recipe bakes 61 cookies, and there are 5 people in her study group. How many cookies does each student get? Use the space below to solve, then interpret the quotient and the remainder in a sentence. (In your own words, what does your solution and remainder represent for this tasty problem?)
Answer: Each person can get 12 cookies, or 12.2
Step-by-step explanation:
All you have to do is divide 61 by 5, your answer would 12 remainder 1, you would then divide 1 by 5 to get 0.2 . Add 12 and .2 to get your answer. The quotient would be 12 and the remainder 1.
Can someone please help me solve this
Answer:
Table B has a constant proportionality between x and y of 0.6
What is the percent of decrease from 70 to 35?
A researcher computes the computational formula for SS, as finds that ∑x = 39 and ∑x2 = 271. If this is a sample of 6 scores, then what would SS equal using the definitional formula?
17.5
3.5
232
not possible to know because the sample mean is not given
If this is a sample of 6 scores, then SS using the definitional formula would equal 17.5.
To find the SS (sum of squares) using the definitional formula, you need to first calculate the mean of the scores. Here's
1. Calculate the mean (µ) using ∑x and the number of scores (n):
Mean (µ) = (∑x) / n
µ = 39 / 6
µ = 6.5
2. Use the computational formula for SS:
SS = ∑x² - ( (∑x)² / n )
SS = 271 - (39² / 6)
SS = 271 - (1521 / 6)
SS = 271 - 253.5
3. Calculate sample score SS:
SS = 17.5
So, the answer is 17.5.
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Maggie is buying 2 shirts that cost 8.50$ each. there is a 6.5% sales tax. what is the total Maggie will pay for the shirts?
Answer:
18.11
Step-by-step explanation:
You have the base cost of 17$ then add that to .065 times 17$
Six more than four times a number is equal to eight added to three times the same number. Find the number
6+4x=8+3x
-3x -6
x=2
the number is 2
Hudson wants to write a letter to his friend. He took out
square paper which covers the total area of 225 feet^2
.
What is the length of any side of the paper?
Answer:
length = 15 feet.
Step-by-step explanation:
This paper is 15 feet across on any side. Who will deliver this monster?
Area = s^2 where s is the length of 1 side.
Area = 225 feet^2 (You sure this isn't inches).
s^2 = area
s^2 = 225 Take the square root of both sides of the equation.
sqrt(s^2) = sqrt(225)
s = 15
2x - 3= y + 3
2x + y = -3
Answer:
your answers are
Step-by-step explanation:
1. \(2x-3=y+3\)
\(2x-3=y+3\\ 2x+y=-3\\divide |by |2\\x+y=-1.5\)
so x + y = -1.5
Let Y 1 ,Y2 and Y3 be independent and identically distributed random variables with expectation E[Yi ]=μ and variance V[Yi ]=σ 2
for i=1,2,3. Suppose we want to estimate the expectation μ, and we propose to combine our three observations Y 1 ,Y2 and Y3 by defining a weighted average: Yˉω =ω1 Y1+ω 2Y2 +ω3 Y3 where ω1 ,ω2 and ω3
are constants between 0 and 1 . 1 (a) Calculate E[ Y
ˉ
ω
]. What condition do the weights ω 1
,ω 2
and ω 3
need to satisfy for Y
ˉ
ω
to be an unbiased estimator for μ ? (b) Calculate V[ Y
ˉ
ω
]. Using the condition you found on (a), find the set of weights that minimize the variance of Y
ˉ
ω
. Justify your answer. Now suppose that observations Y 1
,Y 2
and Y 3
are independent and have the same mean μ, but they have different variances. Specifically, V[Y 1
]=V[Y 2
]=σ 2
and V[Y 3
]=2σ 2
a.) The weights, ω1 + ω2 + ω3 = 1. b.) The weights, V[Y_bar ω] = ω1²V[Y1] + ω2²V[Y2] + ω3²V[Y3] = ω1²σ² + ω2²σ² + ω3²σ² = σ²(ω1² + ω2² + ω3²). To estimate the expectation μ, we propose combining three independent and identically distributed random variables Y1, Y2, and Y3 using a weighted average, Y_bar ω = ω1Y1 + ω2Y2 + ω3Y3.
(a) The weights ω1, ω2, and ω3 need to satisfy the condition ω1 + ω2 + ω3 = 1 for Y_bar ω to be an unbiased estimator for μ. The expectation E[Y_bar ω] is calculated as E[Y_bar ω] = ω1E[Y1] + ω2E[Y2] + ω3E[Y3] = ω1μ + ω2μ + ω3μ = (ω1 + ω2 + ω3)μ. For Y_bar ω to be an unbiased estimator for μ, its expectation should equal μ. Therefore, ω1 + ω2 + ω3 = 1.
(b) The variance V[Y_bar ω] can be calculated as V[Y_bar ω] = V[ω1Y1 + ω2Y2 + ω3Y3]. Since Y1, Y2, and Y3 are independent, the variance of their sum is the sum of their variances. Therefore, V[Y_bar ω] = ω1²V[Y1] + ω2²V[Y2] + ω3²V[Y3] = ω1²σ² + ω2²σ² + ω3²σ² = σ²(ω1² + ω2² + ω3²). The variance of Y_bar(ω) can be calculated, and by applying the condition from (a), the set of weights that minimize the variance can be determined.
To minimize the variance, we can apply the condition from (a), ω1 + ω2 + ω3 = 1, and use a technique called Lagrange multipliers. By introducing the Lagrange multiplier λ, we form the Lagrangian L = σ²(ω1² + ω2² + ω3²) + λ(ω1 + ω2 + ω3 - 1). Taking partial derivatives with respect to ω1, ω2, ω3, and λ, we can solve the equations to find the set of weights that minimize the variance. The specific values will depend on the given values of σ² and the constraints imposed by the problem.
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A company's profit increased linearly from $5 million at the end of year 2 to $17 million at the end of year 6.
(a) Use the two (year, profit) data points (2, 5) and (6, 17) to find the linear relationship y = mx + b between x = year and y = profit.
(b) Find the company's profit at the end of 3 years.
(c) Predict the company's profit at the end of 8 years.
Below, you will learn how to solve the problem.
(a) To find the linear relationship y = mx + b between x = year and y = profit, we first need to find the slope (m) and the y-intercept (b).
The slope (m) is the change in y (profit) divided by the change in x (year):
m = (17 - 5)/(6 - 2)
m = 12/4
m = 3
Next, we can use one of the data points (2, 5) and the slope (3) to find the y-intercept (b):
5 = 3(2) + b
b = 5 - 6
b = -1
So the linear relationship between x = year and y = profit is:
y = 3x - 1
(b) To find the company's profit at the end of 3 years, we can plug in x = 3 into the equation:
y = 3(3) - 1
y = 8
So the company's profit at the end of 3 years is $8 million.
(c) To predict the company's profit at the end of 8 years, we can plug in x = 8 into the equation:
y = 3(8) - 1 = 23
So the company's profit at the end of 8 years is predicted to be $23 million.
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If a project yields monthly savings of $4,000 beginning 4 months after implementation with an initial investment of $42,000 and training costs of $2,000, what is the 5 year ROI from implementation
The 5-year ROI (Return on Investment) from the implementation of the project can be calculated by determining the total savings over the 5-year period and comparing it to the initial investment and training costs.
The project yields monthly savings of $4,000 beginning 4 months after implementation.
To calculate the 5-year ROI, we need to determine the total savings over the 5-year period.
First, we calculate the number of months in 5 years, which is 60 months. Since the savings begin 4 months after implementation, we subtract those 4 months.
So, the total number of months with savings is 56 months.
Next, we multiply the monthly savings of $4,000 by the number of months to obtain the total savings over the 5-year period.
56 months multiplied by $4,000 gives us a total savings of $224,000.
To calculate the 5-year ROI, we subtract the initial investment and training costs from the total savings.
The initial investment is $42,000, and the training costs are $2,000. Therefore, the total cost is $44,000.
Finally, we calculate the ROI by dividing the net savings ($224,000 - $44,000 = $180,000) by the total cost ($44,000) and multiplying by 100 to express it as a percentage.
The ROI is then ($180,000 / $44,000) * 100 = 409.09%.
Therefore, the 5-year ROI from the implementation of the project is 409.09%.
This indicates a positive return on the initial investment and training costs, suggesting that the project is financially beneficial over the 5-year period.
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4. In a study of pedaling technique of cyclists, the following are data on single-leg power at a
high workload were obtained.
244 191 160 187 180 176 174
205 211 183 211 180 194 200
a. Calculate the sample mean and the median. What does the difference between these
values say about the shape of the distribution?
b. Suppose that the first observation had been 204 instead of 244. How would the mean
and median change?
c. The study also reported values of single-leg power for a low workload. The sample
mean for n=13 observations was x ? 119.7692, and the 14th observation was 159.
What is the value of x for all 14 values
(a) The variance and standard deviation of the data set can be calculated using the given formulae.
(b) Subtracting the mean from every observation would not change the variance, but the standard deviation would remain the same.
(c) Dividing each observation by the standard deviation (standardization) would result in a variance of 1 and a standard deviation of 1.
Here, we have,
(a) To calculate the variance, we need to find the average of the squared differences between each observation and the mean. The standard deviation is the square root of the variance. By using the given formulae, we can compute both values.
(b) When we subtract the mean from every observation, the new mean becomes 0 because the sum of the differences is zero. The variance is not affected by the shift in mean because it is calculated using the squared differences from the mean. Therefore, the variance remains the same. The standard deviation, being the square root of the variance, also remains the same.
(c) After dividing each observation by the standard deviation, the new variance becomes 1, and the new standard deviation becomes 1 as well. This happens because dividing each observation by the standard deviation scales the data such that the standard deviation becomes 1. Consequently, the variance, which is calculated based on the squared differences, also becomes 1.
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Consider these two statements:
p: A square is a quadrilateral
q: A hexagon is a parallelogram
Select all of the true statements:
A) ~p
B) ~q
C) p ^ q
D) p ⌄ q
E) ~p ⌄ q
F) p ^ ~q
Thank you if you help
The true logic statements are listed as follows:
B) ~q.
D) p ⌄ q.
F) p ^ ~q.
What are the true statements?A square is a quadrilateral, as it has four sides, hence the statement p is true.
Then, the negative of statement p is false, and option a is false.
The or operation with statement p is always going to be true, as the or operation is true when at least one of the operators is true, hence option D is true.
An hexagon is not a parallelogram, hence statement q is false. Thus, option B is true, as the negative of a false statement is positive.
The and operation is true when all the operators are true, hence option F is true, as statements p and ~q are both true. Statement C is false as only one of the statements is true.
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Light sample A has a frequency of 4.30×1015 Hz and light sample B has a frequency of 8.70×1018 Hz. What is the wavelength of light sample A in meters? Light sample A has a frequency of 4.30×1015 Hz and light sample B has a frequency of 8.70×1018 Hz. What is the wavelength of light sample B in meters? Light sample A has a frequency of 4.30 ×1015 Hz and light sample B has a frequency of 8.70×1018 Hz. Based on frequency, which set gives the most correct description of the types of light for samples A and B respectively? Light sample A has a frequency of 4.30 ×1015 Hz and light sample B has a frequency of 8.70×1018 Hz. Based on frequency, which set gives the most correct description of the types of light for samples A and B respectively?
1) The wavelength of A is equal to 6.98 × \(10^{-8}\)meters
2) The wavelength of B is equal to 3.45 × \(10^{-11}\) meters
Since we know that the wavelength = speed of light / frequency
The speed of light is 3.00 × \(10^8\) meters per second.
For light sample A with a frequency of 4.30 × 10^15 Hz can be calculated as;
wavelength of A = (3.00 × \(10^8\) m/s) / (4.30 × 10^15 Hz)
wavelength of A = 6.98 × \(10^{-8}\) meters
For light sample B with a frequency of 8.70 × \(10^18\) Hz can be calculated as;
wavelength of B = (3.00 × \(10^8\) m/s) / (8.70 ×\(10^18\) Hz)
wavelength of B = 3.45 × \(10^{-11}\) meters
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The highest common factor of 18 and -3
Answer:
3
Step-by-step explanation:
Hope this will help you
A ticket to see your favorite baseball team costs $40.42. That price decreases by $0.23 for every game lost during the regular season. What equation could you use to find the cost C of a ticket after L losses? Represent the total change in the cost of a ticket after the team loses 23 games . What is the price of a ticket after the team loses 23 games?.
The equation that could be used to find the cost C of a ticket after L losses is (40.65-0.23L), the total change in the cost of a ticket after the team loses 23 games is and the price of the ticket after the team losses 23 games is .
According to the question,
We have the following information:
A ticket to see your favorite baseball team costs $40.42. That price decreases by $0.23 for every game lost during the regular season.
So, we have:
40.42, 40.19, 39.96, ....
Now, this series is an A.P. because we have a common difference of -0.23.
The nth term of the series:
an = a+(n-1)d
C = 40.42+(L-1)-0.23
C = 40.42-0.23L+0.23
C = 40.65-0.23L
Now, the price of the ticket after the team loses 23 games:
C = 40.65-0.23*23
C = 40.65-5.29
C = $ 35.36
Now, the change in the price:
40.42-35.36
$ 5.06
The price has been decreased by $5.06.
Hence, the equation that could be used to find the cost C of a ticket after L losses is (40.65-0.23L), the total change in the cost of a ticket after the team loses 23 games is decrease by $5.06 and the price of the ticket after the team losses 23 games is $35.36.
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To solve this system of equations, Ayana isolated y in the first equation and
then substituted for y in the second equation. What was the result?
2y=8x
X^2+y= 5
The solution to the system of equations 2y = 8x and x^2 + y = 5 is the set of ordered pairs (-5, -20) and (1, 4).
The system of equations 2y = 8x and x^2 + y = 5 can be solved using various methods such as substitution or elimination. In this case, Ayana isolated y in the first equation to get y = 4x and substituted it into the second equation.
Substituting y = 4x in the second equation, we get:
x^2 + (4x) = 5
Simplifying this equation by combining like terms, we get:
x^2 + 4x - 5 = 0
This is a quadratic equation that can be solved using the quadratic formula or factoring. Solving for x, we get:
x = -5 or x = 1
Now that we know the value of x, we can use the equation y = 4x (which we obtained by isolating y in the first equation) to find the corresponding values of y. Substituting x = -5 and x = 1 in y = 4x, we get:
y = -20 or y = 4
Therefore, the solution to the system of equations 2y = 8x and x^2 + y = 5 is the set of ordered pairs (-5, -20) and (1, 4).
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Use spherical coordinates to evaluate the integral SSES y2z2 dV where E is the solid between the cone z = sqrt(x2 +y2) and the sphere x2 +y2 +z2=1
the value of the given integral using spherical coordinates is 1/96 π.
To evaluate the given integral using spherical coordinates, we first need to express the limits of integration in terms of spherical coordinates. Since the solid E is defined between the cone z=sqrt(x^2+y^2) and the sphere x^2+y^2+z^2=1, we can write the limits of integration as follows:
0 <= r <= 1
0 <= θ <= 2π
arctan(r) <= φ <= π/2
Here, r is the radial distance, θ is the azimuthal angle (measured from the x-axis), and φ is the polar angle (measured from the z-axis).
Next, we need to express y^2z^2 in terms of spherical coordinates. Since y=r*sin(φ)*sin(θ) and z=r*cos(φ), we have y^2z^2 = r^5*sin^2(φ)*cos^2(φ)*sin^2(θ).
Finally, we can express the integral in terms of spherical coordinates and evaluate it as follows:
∫∫∫ E y^2z^2 dV = ∫0^1 ∫0^2π ∫arctan(r)^π/2 r^5*sin^2(φ)*cos^2(φ)*sin^2(θ) r^2*sin(φ) dr dθ dφ
= 1/6 ∫0^2π ∫arctan(r)^π/2 sin^2(θ)cos^2(θ) dφ dθ ∫0^1 r^7 dr
= 1/12 π/2 ∫0^1 r^7 dr
= 1/96 π
Therefore, the value of the given integral using spherical coordinates is 1/96 π.
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b. The price of gourmet coffee beans at the corner market has increased 10 per year over the past several years. If the current cost is $14 per pound, what did a pound of gourmet coffee beans cost two years ago?
Answer:
I need to know if the ten is supposed to be dollars or cents
The cost of a pound of gourmet beans two years ago is $11.34
Given; The price of gourmet coffee beans at the corner market has increased 10% (0.1) per year over the past several years.
The current cost is $14 per pound .
What is exponential decay equation?The exponential decay equation is given by :-
\(y = a(1\pm r)^m\)
, where r is the rate of decay and A is the initial amount and m is the time period.
Put A = 14 , r= 0.1 and t=2, we get
y = 14(1 - 0.1)^2
y = 11.34
Hence, the cost of a pound of gourmet beans two years ago is $11.34
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12−(−85)+45+(−36)
This is integer question
Solve it
12-(-85)+45+(-36)
negative 1 multiply negative 85 will leave an positive 85 and positive 1 multiply negative36 will also leave negative answer then you simplify to get 106
Find an equivalent expression for -3(2x+5)-(x-1)
Answer:
-7(x+2)
Step-by-step explanation:
-6x-15-x+1-7x-14-7(x+2)-3(2x+5)-(x-1)
↦ -6x+(-15)-x+1
↦-6x-x-15+1
↦7x-14
↦2(x-7)
ANSWER THE QUESTIONS PLS. SERIOUS ANSWERS ONLY. 100 POINTS
Answer:
Step-by-step explanation:
Tnd 50 dia w2 wop p.35.00 dma fw
Answer: the answer is wha the other dude said
Step-by-step explanation:
1.628 > 1.63
I don’t understand math I’m sorry-
Answer:
So that's actually not true. When comparing decimals you should compare each digit. Remember adding a 0 at the end does not change the value of the decimal. So lets look at it up and down:
remember line up the decimal to decimal
1.628
1.630
the first digit is the same. Both of these numbers are also before the decimal.
let's look at the second digit.
1.628
1.630
they are also the same. Both of these are also right after the decimal point.
now let's look at the third digit.
1.628
1.630
In this case, the bottom number has a higher value. Since 3>2, the bottom number is the overall biggest. Or you could look at it and say "Oh! 30 is bigger than 28!" I hope this helps you, and if this wasn't what you were looking for, oops
What is the units digit of 7⁷?
Answer:
\(7^{7}\) = 823543
the unit position (the first) is equal to "3"
Step-by-step explanation:
When 10 is subtracted from the square of a number, the result is 3 times the number. Find the positive solution.
The positive solution is 5.
given,
When 10 is subtracted from a number's square, the result is three times the number.
let x be the number
according to given statement the quadratic equation will be
\(x^2-10=3x\\\\x^2-3x-10\\\\x^2+2x-5x-10=0\\\\x(x+2)-5(x+2)=0\\\\(x-5)(x+2)=0\\\\x=5\ or\ -2\)
Thus, the positive solution is 5.
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Simplify −2r(−16r + 3r − 18).
Answer: 26r^2 + 36r
Step-by-step explanation:
−2r(−16r + 3r − 18)
32r^2 - 6r^2 + 36r
26r^2 + 36r
Answer:
26\(r^2\) + 36r
Step-by-step explanation:
Combine like terms:
-2r(-13r - 18)
Use the distributive property:
-2r(-13r) + (-2r)(- 18)
26\(r^2\) + 36r
what is the role of the term average in statistics
The term "average" plays a fundamental role in statistics. It refers to a measure of central tendency that summarizes a set of data by representing a typical or representative value.
Calculation for the average of a set of numbers, follow these steps:
Add up all the values in the data set.
Division of the sum by the total number of values.
For example, consider the following data set: 10, 15, 20, 25, 30.
Sum all the values: 10 + 15 + 20 + 25 + 30 = 100.
Divide the sum by the total number of values: 100 / 5 = 20.
In this case, the average of the data set is 20.
The term average provides a concise summary of a data set by representing a typical value. It is calculated by adding up all the values and dividing the sum by the total number of values. The average is a fundamental statistical measure that helps in understanding and analyzing data in various fields such as economics, education, research, and many others.
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