Answer:
[tex]\frac{80-19.25}{6.75} = x[/tex]
Step-by-step explanation:
Subtract $19.25 from the Amount Used for Payment ($80) to get the amount spent, then divide the amount of each sandwich to get the amount of sandwiches bought.
A bakery offered a coupon for its catering services. The cost before the coupon was $42.50, and the cost after the coupon was applied was $37.50. Which of the following could be the function equation for this situation?
y = 5/x
y = x/5
y = x + 5
y = x – 5
Answer:
The answer of the function is y=x-5
A cruise company would like to estimate the average beer consumption to plan its beer inventory levels on future seven-day cruises. (The ship certainly doesn't want to run out of beer in the middle of the ocean!) The average beer
consumption over 15 randomly selected seven-day cruises was 81,551 bottles with a sample standard deviation of 4,572 bottles. Complete parts a and b below.
a. Construct a 95% confidence interval to estimate the average beer consumption per cruise.
The 95% confidence interval to estimate the average beer consumption per cruise is from lower limit of _____bottles to an upper limit of ___ bottles (Round to the nearest whole numbers)
b. What assumptions need to be made about this population?
A The only assumption needed is that the population follows the normal probability distribution
B. The only assumption needed is that the population follows the Student's t-distribution
C. The only assumption needed is that the population distribution is showed to one side
D. The only assumption needed is that the population size is larger than 30.
The 95% confidence interval to estimate the average beer consumption per cruise is from 79,440 bottles to 83,662 bottles.
The only assumption needed is that the population follows the Student's t-distribution; option B.
What is the confidence interval?a. Construct a 95% confidence interval:
The formula for a confidence interval, CI, for the population mean (μ) is:
CI = sample mean ± (critical value * standard error)
Given:
Sample mean (x) = 81,551 bottles
Sample standard deviation (s) = 4,572 bottles
Sample size (n) = 15
Confidence level = 95%
With a confidence level of 95% and 15 degrees of freedom (n - 1), the critical value from the t-distribution is approximately 2.131.
Standard error (SE) = s / √n
SE = 4572 / √15
Lower limit of the confidence interval = x - (critical value * SE)
Upper limit of the confidence interval = x + (critical value * SE)
The confidence interval:
Lower limit = 81551 - (2.131 * (4572 / √15))
Upper limit = 81551 + (2.131 * (4572 / √15))
Lower limit ≈ 79440 bottles
Upper limit ≈ 83662 bottles
b. Assumptions about the population:
The only assumption needed is that the population follows the Student's t-distribution. This assumption is required when the population standard deviation is unknown, and we use the sample standard deviation as an estimate.
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A loan of R1 000 is granted at an interest rate of 16% p.a. compounded quarterly. The loan is to be amortised by means of ten consecutive, equal quarterly payments starting one year after the granting of the loan. The balance outstanding on the loan (to the nearest cent) immediately after the seventh quarterly payment has been made is equal to R
The balance outstanding on the loan immediately after the seventh quarterly payment, using an interest rate of 16% p.a. compounded quarterly and equal quarterly payments, is R$310.39.
To calculate the balance outstanding after the seventh quarterly payment, we need to use the formula for the present value of an ordinary annuity:
P = PMT * (1 - (1 + r)^(-n)) / r
Where:
P = Principal amount of the loan (R$1,000)
PMT = Equal quarterly payment
r = Interest rate per period (16% p.a. compounded quarterly = 4% per quarter)
n = Number of periods (10 payments)
First, we calculate the equal quarterly payment (PMT) using the present value of an ordinary annuity formula rearranged to solve for PMT:
PMT = P * (r / (1 - (1 + r)^(-n)))
PMT = 1000 * (0.04 / (1 - (1 + 0.04)^(-10))) = R$129.09
Next, we calculate the balance outstanding after the seventh quarterly payment. We can consider it as the present value of the remaining three payments:
Balance = PMT * (1 - (1 + r)^(-n_remaining)) / r
Where: n_remaining = Number of remaining payments (10 - 7 = 3)
Balance = 129.09 * (1 - (1 + 0.04)^(-3)) / 0.04 = R$310.39
Therefore, the balance outstanding on the loan immediately after the seventh quarterly payment is R$310.39.
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Compute the correct quantile for the margin of error of each confidence interval. Assume all of the statistics used have a normal sampling distribution. Use 3 decimal places.
(a) A 98% confidence interval for based on n = 11 observations with known.
(b) A 98% confidence interval for based on n = 11 observations with unknown.
(c) A 90% confidence interval for a population proportion, p, based on n = 11 observations
(d) A 92% confidence interval based on n = 14 observations for the slope parameter
Assume all of the statistics used have a normal sampling distribution. Use 3 decimal places. Below are the steps of calculation:(a) For a 98% confidence interval for a population mean based on n = 11 observations with known: We know that margin of error formula = Zα/2 σ/√n, Where Zα/2 is the quantile of the normal distribution at α/2, σ is the population standard deviation and n is the sample size. In this case, α = 0.02, n = 11 and Zα/2 = 2.326. The sample size is small, and therefore we assume a normal distribution. Using the formula above, we obtain: margin of error = Zα/2 σ/√n = 2.326 σ/√11(b) For a 98% confidence interval for a population mean based on n = 11 observations with unknown. We know that margin of error formula = tα/2 s/√n. Where tα/2 is the quantile of the t-distribution at α/2, s is the sample standard deviation and n is the sample size. In this case, α = 0.02, n = 11 and tα/2 = 2.718. The sample size is small, and therefore we assume a normal distribution.
Using the formula above, we obtain: margin of error = tα/2 s/√n = 2.718 s/√11(c) For a 90% confidence interval for a population proportion, p, based on n = 11 observations. We know that margin of error formula = Zα/2 √((p(1-p))/n)Where Zα/2 is the quantile of the normal distribution at α/2, n is the sample size, and p is the sample proportion. In this case, α = 0.1, n = 11 and Zα/2 = 1.645.Using the formula above, we obtain: margin of error = Zα/2 √((p(1-p))/n) = 1.645 √((p(1-p))/11)(d) For a 92% confidence interval based on n = 14 observations for the slope parameter. We know that margin of error formula = tα/2 * SE. Where tα/2 is the quantile of the t-distribution at α/2, and SE is the standard error of the estimate. In this case, α = 0.08, n = 14 and tα/2 = 1.771.
Using the formula above, we obtain: margin of error = tα/2 * SE = 1.771 * SE. Therefore, the correct quantile for the margin of error of each confidence interval is as follows:(a) 2.670(b) 2.570(c) 0.512(d) 1.564.
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Rob and Mary are planning trips to nine countries this year. There are 13 countries they would like to visit. They are deciding which countries to skip.
show me how to solve
Answer:
they will skip 4
Step-by-step explanation:
Answer:
They will have to skip the ones that are less desirable to them
Find the x-intercept and
the y-intercept from the
following linear equation:
4x + 7y = 28
X-intercept ([?], [ 1)
y-intercept ([ 1, 1)
Answer:
X-intercept: (7, 0) Y-intercept: (0, 4)Step-by-step explanation:
X-intercept means y-coordinate of 0:
4x +7×0 = 28
4x = 28
x = 7 ← x-coordinate
Y-intercept means x-coordinate of 0:
4×0 +7y = 28
7y = 28
y = 4 ← y-coordinate
A ferris wheel has 15 seats
what angle is each
Each seat on the ferris wheel is at an angle of 24 degrees.
To determine the angle of each seat on a ferris wheel with 15 seats, we can use the concept of angles in a circle.
A circle has a total of 360 degrees. Since the ferris wheel has 15 seats evenly spaced around the circumference, we can divide 360 degrees by 15 to find the angle of each seat.
The calculation is as follows:
360 degrees ÷ 15 seats = 24 degrees per seat.
To visualize this, imagine drawing a circle and dividing it into 15 equal parts. Each part would represent a seat on the ferris wheel, and the angle between each part would be 24 degrees.
Note: The assumption here is that the seats are evenly spaced around the circumference of the ferris wheel. In practice, some ferris wheels may have seats arranged differently, so the angle per seat may vary.
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Three people each rented a car with insurance and one more prson rented a car with a car wash. What is the expression for the total cost
Correct Question is:
A car company charges x dollars to rent a car plus extra options as shown in table.
Car seat = 50 $
Insurance = 75 $
Car Wash = 15 $
Three people each rented a car with insurance and one more person rented a car with a car wash. What is the expression for the total cost?
Step-by-step explanation:
3 people rented with insurance = (x + 75) * 3) = 3x +225
one person rented with car wash = (15+x)
Total car rental will be adding both equations = 3x +225 + 15 + x = 4x + 240
a) Rearrange the following formula to make x the subject.
Give your answer in its simplest form.
4(2x - 3y) = y + 5
+
Answer:
x = 13y + 0.625
Step-by-step explanation:
4(2x - 3y) = y + 5
8x - 12y = y + 5
8x = y + 5 + 12y
8x = 5 + 13y
8x ÷ 8 = 5 + 13y ÷ 8
x = 5 + 13y ÷ 8
x= 13y + 5 ÷8
x = 13y + 0.625
which value represents the zero of the linear function y=5x-10?
A. -10
B. 10
C. -2
D. 2
ILL GIVE YOU BRAINLIEST NO JOKE JUST PLEASE HELKP ME
Answer:
No
Step-by-step explanation:
She needs at least another 2 coordinate pairs to test if her evaluation is correct. For instance, the next pair could be (7,22). Then, the pattern wouldn't be increasing by 4. It would not have a constant of proportionality.
Jacob wrote the expression shown. 10 + 5 + 4(72-6) What do these parentheses indicate in the expression? F Divide 10 by 5 before adding 4 G Multiply 4 by 72 before subtracting 6 H Add 5 and 4 together before subtracting 6 from 72 Subtract 6 from 72 before multiplying by 4
I will give brainliests
Multiply and combine like terms. Use^ for exponents. (2x-10)(3x-3)
Answer:
The answer is 5x - 13
Step-by-step explanation:
All we do is add the x's and the other numbers.
2 + 3 = 5 and 10 + 3 = 13
So, the equation is 5x - 13
Hope this helps! :)
Solve the system using elimination.
Answer:
x = 6
y = 4
Step-by-step explanation:
5x - 7y = 2
x - 7y = -22 (Multiply by -1)
-x + 7y = 22
5x - 7y = 2
4x = 24
x = 6
x - 7y = -22
6 - 7y = -22
-7y = -28
y = 4
Which of these could be an alternative hypothesis for a dependent samples t-test?
μ>30
μd<=0
μ1−μ2#0
μd#0
None of the above
The alternative hypothesis for a dependent samples t-test would be μd≠0.
In a dependent samples t-test, also known as a paired samples t-test, the goal is to compare the means of two related variables or measurements taken from the same sample.
The null hypothesis assumes that the mean difference between the paired measurements is zero (μd = 0). The alternative hypothesis, on the other hand, proposes that there is a significant difference between the means of the two variables.
Among the given options, μ>30 and μd<=0 do not represent the alternative hypothesis for a dependent samples t-test. These options suggest a specific value or direction of the mean, rather than a difference between means.
The option μ1−μ2≠0 is also not the correct alternative hypothesis as it represents the null hypothesis (μd = 0). The option μd ≠ 0, however, accurately represents the alternative hypothesis for a dependent samples t-test. It states that there is a significant difference between the means of the two variables being compared.
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Elena notices that when she spends less time on social media the night before a quiz, she gets a higher score. Before one quiz, she spent 107 minutes on social media and eamed 37 points on a
quiz. Before another quiz, she spent 73 minutes on social media and eamed 11 points on a quiz
write a function to model a linear relationship between Elena's social media usage, in minutes, and her quiz scores, assuming that the total number of points on each quiz remains a constant
Respond in the space provided
Answer:
[tex] f(x) = -\dfrac{2}{17}x + \dfrac{843}{17} [/tex]
Step-by-step explanation:
Given:
Score of 37 with 107 minutes on social media.
Score of 41 with 73 minutes on social media.
The two pieces of information above can be thought of as two points on a line. Since the quiz score is a function of the number of minutes on social medial, let the number of minutes on social media be x and the score be y. The given information gives us two ordered pairs: (107, 37) and (73, 41).
Now we need to write the equation of a line that passes through these two points.
The two-point form of the equation of a line is:
[tex] y - y_1 = \dfrac{y_2 - y_1}{x_2 - x_1}(x - x_1) [/tex]
We have [tex] x_1 = 107 [/tex], [tex] y_1 = 37 [/tex], [tex] x_2 = 73 [/tex], and [tex]y_2 = 41[/tex].
[tex] y - 37 = \dfrac{41 - 37}{73 - 107}(x - 107) [/tex]
[tex] y - 37 = \dfrac{4}{-34}(x - 107) [/tex]
[tex] y - 37 = -\dfrac{2}{17}(x - 107) [/tex]
[tex] 17y - 629 = -2x + 214 [/tex]
[tex] 17y = -2x + 843 [/tex]
[tex] y = -\dfrac{2}{17}x + \dfrac{843}{17} [/tex]
[tex] f(x) = -\dfrac{2}{17}x + \dfrac{843}{17} [/tex]
Use your measuring devices and right angle trigonometry to calculate the height of this triangle.
Answer:
x = 7.98ft or x = 8ft
Step-by-step explanation:
Hope that helps :)
what is the area of the conposite figure?
Step-by-step explanation:
Area of Rectangle = Length x Width
Area of Top Rectangle =
[tex]22 \times (31 - 18) \\ = 22 \times 13 \\ = 286 {ft}^{2} [/tex]
Area of bottom Rectangle =
[tex]18 \times 9 \\ = 162 {ft}^{2} [/tex]
Area of Composite figure = Area of top Rectangle + Area of bottom rectangle
[tex] = 286 + 162 \\ = 448 {ft}^{2} [/tex]
If f(x) = x3, evaluate the difference quotient
f(6+ h) ? f(6)
h
and simplify your answer.
Answer: `h² + 18h + 108`
We have to evaluate the difference quotient of the formula `f(x) when `f(6+ h)?
f(6)` and the expression will be simplified by dividing it by 'h.'
Difference quotient:
The difference quotient is a formula used to find the average rate of change of a function over a specific interval. The difference quotient is defined as:```f(x + h) - f(x) / h```
To find the difference quotient for f(x) = x³, we need to substitute the values as shown below:
f(x + h) = (6 + h)³f(x) = 6³f(x + h) - f(x) = (6 + h)³ - 6³
Now we can substitute these values in the formula of the difference quotient :
'f (6+ h). f(6)`h = (6 + h)³ - 6³ - h/ h
By simplifying the difference quotient we get;`
(6 + h)³ - 6³ - h/ h = (6³ + 3 * 6²h + 3 * 6h² + h³ - 6³) / h`
After simplifying the expression above, the terms 6³ and -6³ cancel out.
We can then combine the like terms (3 * 6²h and 3 * 6h²) and further simplify the expression as follows:`= (3 * 6²h + 3 * 6h² + h³) / h`= (108h + 18h² + h³) / h`= h² + 18h + 108
Answer: `h² + 18h + 108`
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Sameena buys x packets of batteries and y boxes of batteries write down and expression, in terms of x and y, for the total number of batteries sameena buys
Answer:
4x plus 20y
Step-by-step explanation:
4 times x plus 20xy
4x plus 20y
Express as a trinomial.
(x – 3)(3x – 8)
Please do this ASAP i need HELP
Answer:
3x^2 - 17x + 24
Step-by-step explanation:
(x – 3)(3x – 8)
3x^2 + (-8x) + (-9x) + 24
3x^2 - 17x + 24
Let ƒ : [0, 1] → R be a strictly increasing continuous function such that f(0) = 0 and f(1) = 1. Prove that 1 lim I'll [f(x)]" dx = 0 (10 points) n→[infinity]
To prove the statement, we need to show that the limit of the integral tends to zero as n approaches infinity:
[tex]Lim(n→∞) ∫[0,1] [f(x)]^n dx = 0[/tex]
Given that f(x) is a strictly increasing continuous function on the interval [0,1], we can make use of the properties of such functions to prove the statement.
Additionally, [f(x)]^n increases positive integer and is continuous on the interval [0,1] because it is a composition of continuous functions (f(x) and the power function).
[tex]∫[0,1] [f(x)]^n dx[/tex]
Integrating this inequality over the interval [0,1], we have:
[tex]0 ≤ ∫[0,1] [f(x)]^n dx ≤ ∫[0,1] 1 dx0 ≤ ∫[0,1] [f(x)]^n dx ≤ 1[/tex]
0 and 1 are for the positive integer n
Now, as n approaches infinity, we can apply the squeeze theorem. Since the integral is bounded between 0 and 1, and both 0 and 1 approach zero as n tends to infinity, the limit of the integral must also be zero:
[tex]Lim(n→∞) ∫[0,1] [f(x)]^n dx = 0[/tex]
Therefore, we have proven that the limit of the integral as n approaches infinity is zero:
[tex]1 lim(n→∞) ∫[0,1] [f(x)]^n dx = 0[/tex]
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solve the following system of equations using the substitution method. –6x 2y = 8 y = 3x 4 question 9 options: a) no solution b) (0, 4) c) infinitely many solutions d) (8, 8)
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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Explain the error in the solution below. What
additional step needs to be completed?
log x - log5^3 = 2log5^3
log x = 3log5 ^3
log x = log5 3^3.
x = 27
Answer:
x = 1953125
Step-by-step explanation:
log x - log 5^3 = 2 log 5^3
log x - 3 log 5 = 6 log 5
log x = 9 log 5 = log 5^9
x = 5^9
x = 1953125
The ratio of pears to green apples is 1:3 if there are 150 green apples how many pears are there
50. 150 divided by 3
help please.............
Answer:
C
Step-by-step explanation:
CHOOSE C
Helpppppp! No links please, thank you!
PLEASE HELP WILL MARK BRAINLIEST HELP QUICK!!
Answer: Your Answer would be A
Step-by-step explanation:
Which of the following box-and-whisker plots correctly displays the data set?
88 85 86 82 66 75
O
1
70 75
60 65
80 85 90
o
60 65
70 75 80 85 90
60 65 70 75 80 85 90
o
60 65
70 75 80 85
90
Answer:
1
70 75
60 65
80 85 90
o
60 65
70 75 80 85 90
60 65 70 75 80 85 90
o
60 65
70 75 80 85
90 95 105 120 125 130 135 140 145
The box and whisker plot which correctly displays the given data set is option 3.
What is Median?Median of a data set is the element in the middle if the data are arranged in increasing or decreasing order.
Given is a data set.
88 85 86 82 66 75
A box and whisker plot is used to summarize the data using boxes which shows the quartiles in the plot.
Arranging the data set in increasing order,
66 75 82 85 86 88
Highest value in the data set = 88
Lowest value = 66
The plot which correctly displays these two points are options 2 and 3.
Now, find the median of the data set.
Median is the average of 3rd and 4th element since this consist of even number of data sets.
Median = (82 + 85) / 2 = 83.5
This is correctly marked in option 3.
Hence the correct option is third one.
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The complete question is given in the image below. :
Plzzzz help with the square ( parallelograms)
Answer:
#1=8
#2=3
Step-by-step explanation: