Step-by-step explanation:
1+ 1 Is equal to 2
Hope it helps :)
Answer:
2
Step-by-step explanation:
I really hope this helped .....I know how hard maths can be but I believe in u:)))))))))
A study showed that 25% of the students drive themselves to school. Based on the suggested probability, in a class of 18 students, what would be the probability that at least 6 students drive themselves to school? (CDF)
A) 0.139
B) 0.283
C) 0.717
D) 0.861
Answer:
B) 0.283
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
25% of the students drive themselves to school.
This means that [tex]p = 0.25[/tex]
Class of 18 students
This means that [tex]n = 18[/tex]
What would be the probability that at least 6 students drive themselves to school?
This is
[tex]P(X \geq 6) = 1 - P(X < 6)[/tex]
In which
[tex]P(X < 6) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5)[/tex]
So
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 0) = C_{15,0}.(0.25)^{0}.(0.75)^{18} = 0.006[/tex]
[tex]P(X = 1) = C_{15,1}.(0.25)^{1}.(0.75)^{17} = 0.034[/tex]
[tex]P(X = 2) = C_{15,2}.(0.25)^{2}.(0.75)^{16} = 0.096[/tex]
[tex]P(X = 3) = C_{15,3}.(0.25)^{3}.(0.75)^{15} = 0.17[/tex]
[tex]P(X = 4) = C_{15,4}.(0.25)^{4}.(0.75)^{14} = 0.213[/tex]
[tex]P(X = 5) = C_{15,5}.(0.25)^{5}.(0.75)^{13} = 0.199[/tex]
[tex]P(X < 6) = P(X = 0) + P(X = 1) + P(X = 2) + P(X = 3) + P(X = 4) + P(X = 5) = 0.006 + 0.034 + 0.096 + 0.17 + 0.213 + 0.199 = 0.718[/tex]
[tex]P(X \geq 6) = 1 - P(X < 6) = 1 - 0.718 = 0.282[/tex]
Closest option is B, just a small rounding difference.
Which one does not belong?
Answer:
soooooooo where's the rest of the question? LOL
Step-by-step explanation:
How many solutions can be found for the system of linear equations represented on the graph?
Answer:
one solution
⇒ The system of linear equation represented on the graph has only one solution.
An automobile manufacturing plant produced vehicles today: were sedans, were trucks, and were motorcycles. Plant managers are going to select two of these vehicles for a thorough inspection. The first vehicle will be selected at random, and then the second vehicle will be selected at random from the remaining vehicles. What is the probability that the first vehicle selected is a sedan and the second vehicle is a truck?
Question is incomplete :
Number of each type of vehicle produced isn't given :
An automobile manufacturing plant produced 32 vehicles today: 10 were sedans, 11 were vans, and 11 were trucks. Plant managers are going to choose two of these vehicles for thorough inspection. The first vehicle will be chosen at random, and then the second vehicle will be chosen at random from the remaining vehicles.
What is the probability that the first vehicle selected is a sedan and the second vehicle is a truck?
Answer:
55 / 496
Step-by-step explanation:
Total possible outcomes = 32
Number of Sedan = 10
Vans = 11
Trucks = 11
P(first selection is sedan) :
Number of sedan / total number of vehicles
= 10 /32 = 0.3125
P(second is a truck)
Total possible outcomes = 32 - 1 = 31
Number of trucks = 11 / 31
(10/32 * 11/31)
= (10*11) / (32*31)
= 110 / 992
= 55 /496
What is 8/9 times 1/2
Answer:
4/9
Step-by-step explanation:
8*1/9*2 = 8/18=4/9
Answer:
0.4444444444444(repeating)
Step-by-step explanation:
good luck on your homework/test!
What this will look like on STAAR
Example 4: A wheel has a diameter of 10 millimeters,
Circle the answer
with shapes tool
C=
Now that we have estimated,
we can look for which is closest
Which measurement is closest to the circumference of the
circle in millimeters?
A, 15.71 mm
B. 31.42 mm
C. 62.83 mm
Answer:
Could you send a picture of the work please!
Step-by-step explanation:
If y = 5x-2 were changed to y = 3x-2how would the graph of the new
function compare with the first one?
Hi there! The answer is B. it would be less steep.
The change of the function (in this case) influences the slope of the line. Since we've modified the slope from 5 to 3/4, the line will be less steep.
Use the GCF and the Distributive Property to
rewrite the following expression:
24 +30
Answer:
B = 6(4 + 5)
Step-by-step explanation:
GCF = The greatest common factor, example: GCF of 12 and 16 = 12 is divisible by all of these numbers. The factors for 16 are 1, 2, 4, 8, 16. The two numbers (12 and 16) share common factors (1, 2, 4). The greatest of these is 4 and that is the greatest common factor.
Distributive property = allows us to multiply the number by a group of numbers, which are added together. The distributive property is given by: a(b+c) = ab + ac
The Greatest Common Factor of 24 and 30 is 6 because it is the largest number they have together (24 = 6*4 and 30 = 6*5)
24 divided by 6 = 4
30 divided by 6 = 5
This fits B the most: 6(4 + 5)
The answer is B, I hope this helps!
What is the solution to the system of equations graphed below?
y = 3x + 2
5
y = -2x - 3
Answer:
-2, 1 i'm very positivee
The RADIUS of the barrel is 4. What is the area of the barrel?
45 is what % of 50. i need to know now
Answer:
90%
Step-by-step explanation:
Answer:
90%.
Step-by-step explanation:
50 is half of 100. 45 is half of 90.
So, 45 is 90% of 50.
−3x^2−4x+7 answer this problem please - algebra - factoring
Answer:
-(x-1) (3x+7)
Step-by-step explanation:
Answer:
-((x - 1)(3x + 7))
Step-by-step explanation:
please help me asap.
a hockey goalie scores 82% of shots at the goal, about how many shots can the goalie predict he will block in 735 tries
Answer:600
Step-by-step explanation:
WILL GIVE BRAINLEST, What is the height of the trapezoid if the Area = 77 ft²?
Answer:
h = 7.333
Step-by-step explanation:
Answer: 7
Step-by-step explanation: I'm not sure about the actual mathematical explanation but I just took the quiz and I'm in the review right now :D
45 Tyrone is converting 50 to a percent. Which method should he use to find the percent? Divide the numerator and denominator of the fraction by 2. Subtract 40 from the numerator and denominator of the fraction. Multiply the numerator and the denominator of the fraction by 2. Add 50 to the numerator and denominator of the fraction.
Answer:
3. multiply the numerator and denominator of the fraction by 2
Step-by-step explanation:
Multiplying the numerator and denominator by 2 is like multiplying the fraction by 2/2. 2/2 is one so it doesn't change the value.
Answer:
❌Divide the numerator and denominator of the fraction by 2.
❌Subtract 40 from the numerator and denominator of the fraction.
✔️Multiply the numerator and the denominator of the fraction by 2.
❌Add 50 to the numerator and denominator of the fraction.
For the following report about a statistical study, identify the items below: to find the public's views on obesity, researchers waited outside a fast food restaurant they had randomly selected from a list of such establishments. they stopped every 25th person who came out of the restaurant and asked whether he or she thought obesity was a serious problem.
1. The population:____.
a. all people except those who work at fast food restaurantfast food restaurants.
b. people.
c. every 25th person leaving the restaurant.
d. all people that go to fast food restaurantfast food restaurants.
2. The population parameter of interest:_____.
a. proportion who think obesity is not a serious problem.
b. proportion of people who think obesity is a serious problem.
c. proportion of people who answered the survey.
d. proportion of people who did not answer the survey.
3. The sampling frame:_____.
a. all people except those who work at fast food restaurantfast food restaurants.
b. people who think obesity is a problem.
c. every 25th person leaving the restaurant.
d. restaurant customers.
4. The sample:____.
a. people.
b. every person leaving the restaurant.
c. every 25th person leaving the restaurant.
d. all people except those who work at fast food restaurantfast food restaurants.
5. The sampling method, including whether or not randomization was employed:_____.
a. questionnaire (non-random).
b. not specified, non-random.
c. not specified, but at least "random".
d. systematic sampling.
6. Any potential sources of bias you can detect and any problems you see in generalizing to the population of interest:
A. Response bias is possible. The study is conducted in such a way as to achieve a desired response that may be different from the population in general.
B. Non-response bias is possible. Since some people leaving the restaurant may not respond to theinterview, the study may misrepresent the general population.
C. Undercoverage bias is possible. Since those interviewed just left a fast food restaurant commafast food restaurant, their opinions about obesity may differ from the population in general.
D. There is no indication of bias.
Answer:
Step-by-step explanation:
From the short passage given in the question, we are fill in the gaps with the options provided in each question. Below shows the correctly selected answer after thoroughly going through the passage.
1
b. people
2
[tex]\mathbf{b. \ proportion \ of \ people \ who \ think \ obesity \ i s \ a \ serious \ problem.}[/tex]
3
d. restaurant customers.
4
c. every 25th person leaving the restaurant.
5
d. systematic sampling.
6
C. Undercoverage bias is possible. Since those interviewed just left a fast-food restaurant, fast food restaurant, their opinions about obesity may differ from the population in general.
1. In the right triangle shown below, determine the value of x. (Round to the nearest
tenth.)
Answer:
20.8
Step-by-step explanation:
so x is opposite the 60 degree angle so that means that it is half of the hypotanuese times root three
so then x would be equal
24/12=12 root three which is equal to 20.8
Pick the object that matches this description:
The object is a square with an equilateral triangle Inside of it. One side of the
square is also a side of the triangle.
A.
B.
C.
Suppose that a company wishes to predict sales volume based on the amount of advertising expenditures. The sales manager thinks that sales volume and advertising expenditures are modeled according to the following linear equation. Both sales volume and advertising expenditures are in thousands of dollars.
Estimated Sales Volume =46.63+0.47(Advertising Expenditures)
If the company has a target sales volume of $275,000, how much should the sales manager allocate for advertising in the budget?
Answer:
$485890
Step-by-step explanation:
Given
Estimated Sales Volume =46.63+0.47(Advertising Expenditures)
Required
Find the allocated amount for advertising expenditure when target sales is $275000
Represent the sales volume with V and The advertising expenditure with a.
So, the expression is:
[tex]V = 46.63 + 0.47A[/tex]
Since the expression is in thousands, substitute 275 for V
[tex]275 = 46.63 + 0.47A[/tex]
Collect Like Terms
[tex]275 - 46.63 = 0.47A[/tex]
[tex]228.37= 0.47A[/tex]
Make A the subject
[tex]A = \frac{228.37}{0.47}[/tex]
[tex]A = 485.89[/tex]
Hence, $485890 should be allocated for advertising
y= 2x+4
How many solutions does this linear system have?
x + 2y = 8
O one solution: (8,0)
one solution: (0, 8)
no solution
O infinite number of solutions
Answer:
the answer is (-8,0)
Step-by-step explanation:
thats the right answer
The firm is requested to send 3 employees who have positive indications of asbestos on to a medical center for further testing. Suppose 40% of the employees have positive indications of asbestos in their lungs. a) Find the probability that exactly 10 employees will be tested in order to find 3 positives
Answer:
0.0645 = 6.45% probability that exactly 10 employees will be tested in order to find 3 positives
Step-by-step explanation:
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
In which [tex]C_{n,x}[/tex] is the number of different combinations of x objects from a set of n elements, given by the following formula.
[tex]C_{n,x} = \frac{n!}{x!(n-x)!}[/tex]
And p is the probability of X happening.
40% of the employees have positive indications of asbestos in their lungs
This means that [tex]p = 0.4[/tex]
a) Find the probability that exactly 10 employees will be tested in order to find 3 positives
2 within the first 9([tex]P(X = 2)[/tex] when [tex]n = 9[/tex]), and the 10th, with 0.4 probability. So
[tex]P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}[/tex]
[tex]P(X = 2) = C_{9,2}.(0.4)^{2}.(0.6)^{7} = 0.1612[/tex]
0.4*0.1612 = 0.0645
0.0645 = 6.45% probability that exactly 10 employees will be tested in order to find 3 positives
The length of a rectangle is 9 inches and its perimeter is 48 inches. What is the width of the rectangle?
A. Let x represent the unknown width of the rectangle. Write an equation that can be solved for the unknown measurement.
B. Solve your equation to find the width of the rectangle. Show all your work.
THIS IS FOR A GRADE!!!!! PLS HELP!!!!!!!!!! I WILL GIVE BRANILEST TO WHOEVER ANSWERS
Answer:
The width is 15 inches long
URGENT!!! Find the value of x using the similar trapezoids below.
Answer:
x= 30
Step-by-step explanation:
find the corresponding ratio AD:EH
20:12=5:3
is it constant? yes because 15:9 is also 5:3
if we're trying to find x on the larger side, we do x:18
what divides into 18 to equal 3? 6
we take 6 times 5 =30 so the ratio is now 30:18=5:3 so we know its correct
perimeters of similar figures
what is the volume of the rectangular prism?
Answer:
7yd cubed
Step-by-step explanation:
The total length of all the sides are:
2 1/3 yards (length)
1 yard (width)
3 yards (height)
So just multiply 2 1/3*1*3
What is 34 ÷ 18 ? Explain your reasoning.
Answer:
2 because the number 18 have fitf in 34 but just two , now the answer is 2
Step-by-step explanation:
de-13m+5n-8p sustraer 7p-8m+3n
Answer:
its 300
Step-by-step explanation:
Mariana owed her grandmother $2.75 but was recently able to pay her back $1.25. How much does Mariana currently owe her grandmother?
Find the distance between 12 and -6. HELP.???
Answer:
espero que te haya servido :]