Answer:
1,390x
Step-by-step explanation:
Y = 475x + 250 = 725x
Y = 565x + 100 = 665x
If your look for the sum, its 1,390x
The sum of the two numbers is 40 and the difference is 6. What are the numbers?
ALEKS QUESTION
Answer:
17 + 23 = 40
23 - 17 = 6 the other person did it right.
Which expression is equivalent to 63 + 27?
A. (9 x 7)(
93)
B. 9(7 + 3)
C. (9 + 7)(9 + 3)
D. 9 + (7 * 3)
• plot the two points
• draw the hypotenuse
• complete the triangle
• use the Pythagorean theorem to find the distance between the
given points
• show all your work
• leave answers in simplest radical form.
1. (3, 4), (-2, 6)
У
61
.
2
10
8 9 10
9514 1404 393
Answer:
√29
Step-by-step explanation:
We can call the given points A(3, 4) and B(-2, 6).
The right triangle with segment AB as a hypotenuse can best be drawn along grid lines. Then the vertical leg is the difference of y-coordinates: 6-4 = 2, and the horizontal leg is the difference of x-coordinates: 3 -(-2) = 5.
The Pythagorean theorem tells you the square of the hypotenuse is the sum of the squares of the legs.
AB² = 2² + 5²
AB² = 4 + 25 = 29
Taking the square root, we find the length of the line segment between the points to be ...
AB = √29
20 POINTS NEED HELP ASAP!!! PLS PUT EXPLANATION ALSO!!
1)Based on the results of the simulation, the chances of a group having at least one senior is______ unlikely, neither unlikely or likely, likely
2)Based on the results of the simulation, the chances of a group having more than two freshmen is________ unlikely, neither unlikely or likely, likely
3)Based on the results of the simulation, the experimental probability of a group having four students from the same grade level is __%
4)Based on the results of the simulation, if 224 groups are formed, about how many of them would you expect to contain one student from each grade level? Round your answer to the nearest number of groups. ________groups
5) Based on the results of the simulation, if 115 groups are formed, about how many of them would you expect to contain at least two freshmen? Round your answer to the nearest number of groups. 18 groups, 23 groups, 15 groups, 12 groups.
Answer:
1) 19/25 likely
2)5/25 unlikely
3) 2/25 = 8%
I have to go so I cant finish 4 and 5 but I hope this helped
Step-by-step explanation:
1) this is based just on the results so we don't have to do any probability tree or anything. there are 25 groups overall and 19 of those 25 groups contain at least one senior. this is 76% and is over 2 thirds so it is likely
2) again this is based just on the results so we don't have to do any probability tree or anything. there are 25 groups overall and 5 of those 25 groups contain at least 2 freshmen. this is 20% and is under 1 third so it is unlikely
3)again this is based just on the results so we don't have to do any probability tree or anything. there are 25 groups overall and 2 of those 25 groups contain four students from the same grade level. this is 8% and so is unlikely.
13 A shoe company is going to close one of its two stores and combine all the inventory from both stores. These polynomials represent the inventory in each store: 1 Store A: 7 + 2 2 Store B: 392 - 1 g+ 5 4 Which expression represents the combined inventory of the two stores?
Answer:
[tex]\frac{7}{2}g^2-\frac{4}{5} g+\frac{15}{4}[/tex]
Answer is A
hope this helps
A company categorizes its employees in three groups: I, II, and III, which constitute 20%, 60%, and 20% of the workforce respectively. Furthermore, 10%, 20%, 5% employees of group I, II, III respectively are considered certified. Given that a randomly picked employee is not certified, what is the probability that this employee belongs to group I?
Answer:
the probability that this employee belongs to group I is 0.2118
Step-by-step explanation:
Given the data in the question;
P( group 1 ) = 0.20
P( group 11 ) = 0.60
P( group 111 ) = 0.20
now
[tex]P( \frac{certified}{Group1} )[/tex] = 0.10
[tex]P( \frac{Not-certified}{Group1} )[/tex] = 0.90
[tex]P( \frac{certified}{Group11} )[/tex] = 0.20
[tex]P( \frac{Not-certified}{Group11} )[/tex] = 0.80
[tex]P( \frac{certified}{Group111} )[/tex] = 0.05
[tex]P( \frac{Not-certified}{Group111} )[/tex] = 0.95
so
[tex]P( \frac{group1}{Not-certisfied} )[/tex] = [ [tex]P( \frac{Not-certified}{Group1} )[/tex] × P( group 1 ) ] / [ [tex]P( \frac{Not-certified}{Group1} )[/tex] × P( group 1 ) + [tex]P( \frac{Not-certified}{Group11} )[/tex] × P( group 11 ) + [tex]P( \frac{Not-certified}{Group111} )[/tex] × P( group 111 ) ]
we substitute
[tex]P( \frac{group1}{Not-certisfied} )[/tex] = [ 0.90×0.20 ] / [ 0.90×0.20 + 0.80×0.60 + 0.95×0.20
[tex]P( \frac{group1}{Not-certisfied} )[/tex] = 0.18 / [ 0.18 + 0.48 + 0.19 ]
[tex]P( \frac{group1}{Not-certisfied} )[/tex] = 0.18 / 0.85
[tex]P( \frac{group1}{Not-certisfied} )[/tex] = 0.2118
Therefore, the probability that this employee belongs to group I is 0.2118
value of 180 when b = 4
Answer:
the answer is 45
Step-by-step explanation:
(180/4)=45
someone please help me answer these!
Answer:
[tex]f(8) = 81[/tex]
[tex](g\ o\ f)(x) = x^2 + 2x -4[/tex]
Step-by-step explanation:
Solving (a):
[tex]f(x) = x^2 + 2x +1[/tex]
[tex]g(x) = x - 5[/tex]
Solve for f(8)
We have:
[tex]f(x) = x^2 + 2x +1[/tex]
Substitute 8 for x
[tex]f(8) = 8^2 + 2*8 +1[/tex]
Solve
[tex]f(8) = 64 + 16 +1[/tex]
[tex]f(8) = 81[/tex]
Solving (b):
[tex](g\ o\ f)(x)[/tex]
This is solved by:
[tex](g\ o\ f)(x) = g(f(x))[/tex]
So, we have:
[tex]g(x) = x - 5[/tex]
[tex]g(f(x)) = f(x) - 5[/tex]
Substitute: [tex]f(x) = x^2 + 2x +1[/tex]
[tex]g(f(x)) = x^2 + 2x + 1 - 5[/tex]
[tex]g(f(x)) = x^2 + 2x -4[/tex]
Hence:
[tex](g\ o\ f)(x) = x^2 + 2x -4[/tex]
Data was collected from a simple random sample of 200 cell phone users age 18 or older in the United States. Each user was categorized by age-group and by whether he or she uses a certain cell phone app. The table shown summarizes the data, with expected cell counts in parentheses.
Uses Cell Phone App
Yes No Total
Age-Group Young Adults 4 (15.2) 76 (64.8) 80
Older Adults 29 (19.38) 73 (82.62) 102
Elderly Adults 5 (3.42) 13 (14.58) 18
Total 38 162 200
Which statement is true about whether the conditions for a chi-square test for independence have been met?
A. All necessary conditions are satisfied to apply a chi-square test for independence between age group and texting use by cell phone users.
B. The data from the different age groups are not the result of independent random samples; therefore, the conditions for the test are not met
C. The total sample size in one or more of the age-groups is too small to meet the conditions of the chi-square test for independence.
D. Not all of the observed cell counts are large enough to satisfy the conditions for the chi-square test for independence.
E. Not all of the expected cell counts are large enough to satisfy the conditions for the chi-square test for independence
Answer:
D
Step-by-step explanation:
i took it
Answer:
d
Step-by-step explanation:
my stats teacher went over it
(Look at pictures)
Geometry
(Plz answer fast ill give all points and brainly)
Answer:
D
Step-by-step explanation:
Clockwise would mean a rotation to the right, and since the triangle is already plotted, just use the little picture turning icon( in the top right corner of the photo of the problem) to turn, and look at the triangle in the original graph to see how it moved.
Then click the button three more time until you get the photo right-side-up, and choose which option is the best answer.
Help #2-8 please thank you !
PLEASE PLEASE HELP!!!!!
I NEED HELP WITH EDMENTUM PLATO
ALGEBRA 2!
IF ANYONE HAS ANSWERS PLEASE SEND THEM
Answer:nonononononnj
Step-by-step explanation:
Pls help ! I have a couple of minutes left.
Answer:
The building would be about 77 feet!
Step-by-step explanation:
Brainliest Please!
What is the volume of a sphere with a surface area of 196 π ft2 ? Question 12 options: 1372/ 3 π ft3 457/ 3 π ft3 226/ 3 π ft3 420 π ft3
Answer:
1372/3
Step-by-step explanation:
Complete the table for the following function y = (one-third) Superscript x x -3 -2 -1 0 1 2 3 y 3 1 One-third Graph the function and describe what the graph looks like. a. Increases in Quadrant I b. Increases from left to right c. Decreases from left to right d. Decreases in Quadrant III
The correct answer is option c.
How graph is analyzed?
If we have function, then first we will find ordered pairs then will draw the graph and then will analyze the changes in the graph.
What will be the complete table?Compute the y values of the function at the given x values by substituting all the x values into the given function individually and make a table like Fig 1.
What will be the graph?We will draw all the points of the table on the graph and will join them.
What is the conclusion from the graph?From the graph, it is clearly visible that the curve is decreasing while moving from left to right.
Therefore, the correct option is c.
Learn more:
https://brainly.com/question/20598664
#SPJ2
Answer:
c. decreases from left to right
Step-by-step explanation:
Correct on edge
Quick help what is 4 2/9 divided by 1/3
Answer:
[tex]12\frac{2}{3}[/tex]
Step-by-step explanation:
Simplify: 4 - 16
20
12
-20
-12
Q) 4 - 16 = ?
→ 4 - 16
→ [ -12 ]
The answer is -12.
HELLLLLLPPPPPPPPO MEEEEEEEEE
Answer:
Volume = lwh
V = 1.6 x 2.8 x 3.2
V = 14.336
V = 14.3 cubed
Yellow is the right answer.
Help will be super appreciated !
Line L is parallel to line M if the measure of angle six is 75 what is the measure of angle one
please please i need help i did not understand it
Answer:
h = 20 ftStep-by-step explanation:
Given,
Volume = 5600 sq.ft
Length = 35 ft
Width = 8 ft
Therefore,
By the problem,
[tex]height = \frac{volume}{length \times width} [/tex]
[tex] = > h = \frac{5600}{35 \times 8} ft[/tex]
=> h = 20 ft (Ans)
At midnight, the temperature was 43.7°F. In the morning, the temperature was −3.6°F. Which statement describes the temperature?
Answer: At midnight, the temperature was 43.7 degrees above 0, and in the morning, it was 3.6 degrees below 0
HOPE THIS HELPS
Find the value of x in the triangle shown below 8 2
In the triangle in question, x has a value of √68. The triangle is right - angled triangle based on the dimensions provided. According to this, the neighboring angle will also be x°.
What is an angle?An angle is a shape made up of two rays that share a terminus and is designated by the name of the angle (the vertex).
The plane that contains the rays contains the angles created by two beams. The meeting of two planes might also result in an angle. These are referred to as dihedral angles.
An angle is created when two straight lines or rays intersect at the same point. The point where all points converge is known as an angle's vertex.
The Roman word angulus, which means "corner," is where the term "angle" comes from. In plane geometry, an angle is a shape made up of two rays or lines with the same termination.
In the triangle in question, x has a value of √68.
The triangle is right- angled triangle based on the dimensions provided. According to this, the neighboring angle will also be √68.
Therefore, a given triangle's angles will all be expressed mathematically as -
Using Pythagoras theorem,
[tex]x^{2} = 8^2 + 2^2\\x^{2} = 64 + 4\\x^{2} = 68\\x = \sqrt{68}[/tex]
As a result, the given triangle's x value is √68.
To learn more about the angle, refer to:
brainly.com/question/25716982
#SPJ1
Company XYZ will pay a death benefit of $1000 to each of its 5000 employees who die in the upcoming year. There is 3% chance that an employee will die in the upcoming year. Determine the amount of funds that Company XYZ needs to have if the company wants to have a 95% probability of having sufficient money to pay the benefits. (You may ignore the continuity correction.)
Answer:
idc
Step-by-step explanation:
A study of fox rabies in southern Germany gave information about different regions and the occurrence of rabies in each region. A random sample of 16 locations in Region 1 yielded a mean of 4.75 cases of rabies with a standard deviation of 2.8 cases. An independent sample of 15 locations in Region 2 yielded a mean of 3.93 cases with a standard deviation of 2.4 cases. If you want to test whether the average number of rabies cases in Region 1 is greater than the average number of rabies cases in Region 2, which is the appropriate Data Analysis tool
Answer:
Two independent sample t test
Step-by-step explanation:
The research described describes the statistics of two different samples which are also independent,
Sample 1 :
Sample size, n1 = 16
Mean, xbar = 4.75
Standard deviation s2 = 2.8
Sample 1 :
Sample size, n1 = 15
Mean, xbar = 3.93
Standard deviation s2 = 2.4
The hypothesis :
H0 : μ1 = μ2
H1 : μ1 ≠ μ2
The t statistic :
(xbar1 - xbar 2) ÷ sqrt[(s1²/n1 + s2²/n2)
From on the test statistic, obtain the p value and compare with Given α - value to make and conclude in a decision.
g Annual starting salaries in a certain region of the U. S. for college graduates with an engineering major are normally distributed with mean $39725 and standard deviation $7320. Suppose a school takes a sample of 125 such graduates and records the annual starting salary of each. The probability that the sample mean would be at least $39000 is about
Answer:
The probability that the sample mean would be at least $39000 is of 0.8665 = 86.65%.
Step-by-step explanation:
To solve this question, we need to understand the normal probability distribution and the central limit theorem.
Normal Probability Distribution:
Problems of normal distributions can be solved using the z-score formula.
In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the p-value, we get the probability that the value of the measure is greater than X.
Central Limit Theorem
The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]s = \frac{\sigma}{\sqrt{n}}[/tex].
For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.
Mean $39725 and standard deviation $7320.
This means that [tex]\mu = 39725, \sigma = 7320[/tex]
Sample of 125
This means that [tex]n = 125, s = \frac{7320}{\sqrt{125}}[/tex]
The probability that the sample mean would be at least $39000 is about?
This is 1 subtracted by the pvalue of Z when X = 39000. So
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
By the Central Limit Theorem
[tex]Z = \frac{X - \mu}{s}[/tex]
[tex]Z = \frac{39000 - 39725}{\frac{7320}{\sqrt{125}}}[/tex]
[tex]Z = -1.11[/tex]
[tex]Z = -1.11[/tex] has a pvalue of 0.1335
1 - 0.1335 = 0.8665
The probability that the sample mean would be at least $39000 is of 0.8665 = 86.65%.
The sphere on the left has radius
and a volume equal to 60 units. Find
the volume of the sphere with twice
the radius.
Answer:
480 units ^3
Step-by-step explanation:
it was on the key but im not sure how to solve it
A potato chip company produces a large number of potato chip bags each day and wants to investigate whether a new packaging machine will lower the proportion of bags that are damaged. The company selected a random sample of 150 bags from the old machine and found that 15 percent of the bags were damaged, then selected a random sample of 200 bags from the new machine and found that 8 percent were damaged. Let p^O represent the sample proportion of bags packaged on the old machine that are damaged, pˆN represent the sample proportion of bags packaged on the new machine that are damaged, pˆC represent the combined proportion of damaged bags from both machines, and nO and nN represent the respective sample sizes for the old machine and new machine.
Required:
Have the conditions for statistical inference for testing a difference in population proportions been met?
Answer:
The conditions for the approximation have been met
Step-by-step explanation:
Random samples on both cases and
p∧o proportion of bags packaged on the old machine that are damaged
p∧n sample proportion of bags packaged on the new machine that are damaged
p∧c = ( p∧o + p∧n ) / (nO + nN )
p∧o = 15 % p∧o = 0,15 nO = 150
p∧o * nO = 0,15 *150 p∧o * nO = 22,5
p∧n = 8 % p∧n = 0,08 nN = 200
p∧n*nN = 0,08 * 200 p∧n*nN = 16
Both p∧n*nN and p∧o * nO are bigger than 5
Therefore both samples are big enough for the approximation of the binomial distribution to normal distribution
Find two positive numbers whose difference is 15 and whose product is 154.
NO LINKS
A residential community was polling households to find out whether they wanted to get their TV signal from a satellite or cable. The results are shown in the Venn diagram.
A circle labeled satellite 55 overlaps a circle labeled cable 75. Overlap is labeled 12. 4-column table with 3 rows. First column has no label with entries satellite, not satellite, total. Second column is cable with entries blank, 51%, blank. Third column is not cable with entries a, b, blank. Fourth column is labeled total with entries blank, blank, 100%.
What are the values of a and b in the relative frequency table for the survey results? Round answers to the nearest percent.
a = 82%, b = 3%
a = 38%, b = 50%
a = 38%, b = 3%
a = 93%, b = 19%
Answer:
a
Step-by-step explanation:
made a 100
Answer:
a = 38%, b = 3%
Step-by-step explanation:
got it correct.