In a survey, of the voters support a particular referendum. If 40 voters are chosen at random, find the mean and variance for the number of voters who support the referendum.
This question is incomplete, the complete question is;
In a survey, 55% of the voters support a particular referendum. If 40 voters are chosen at random,
find the mean and variance for the number of voters who support the referendum.
Answer:
a) The Mean is 22
b) Variance is 9.9
Step-by-step explanation:
Given that;
55% of the voters support a particular referendum p = 0.55
q = 1 - p = 1 - 0.55 = 0.45
sample size n = 40
a)
Mean = sample size n × p
Mean = 40 × 0.55
Mean = 22
Therefore the Mean is 22
b)
Variance = n × p × q
so we substitute
Variance = 40 × 0.55 × 0.45
Variance = 9.9
Therefore the Variance is 9.9
help plz!!!! its urgent
2,3
1,1.5
maybe, hope this helps
13,84,85 are the last ones please help
Answer:
49,36,85
Step-by-step explanation:
c in step 4 comes from step 3... 49+36
a and b in step 3 come from step 2... in the same (you've got a - b and then 7 squared - 6 squared, so a is 49 and b is 36
Which ordered pairs are solutions to the equation 2x+9y=11
Answer:
Step-by-step explanation:
x:1 y:1 (1,1)
x:(-8) y:3 (-8,3)
x:(-17) y:5 (-17,5)
increasing or decreasing of x values equal to y coefficient
increasing or decreasing of y values equal to x coefficient
This values goes about infinity according to this formula
The points that lie on the given line are the solution of the line.
What is an equation of a line?The equation y = mx + c is the general equation of any straight line where m is the gradient of the line and c is the y -intercept.
Given is an equation of a line 2x+9y = 11, we need to find its solution,
Since, the line is an infinite object it carries an infinite solution too.
When we plot the graph of this line, all the points lying on it will be the solution of the line.
Let say x = 0,
2(0)+9y = 11
9y = 11
y = 11/9
Therefore, (0, 11/9) is the solution of the equation,
Let say x = 1
2(1) + 9y = 11
y = 1
Therefore, (1, 1) is the solution of the equation,
Please check the graph attached.
Hence, the points that lie on the given line are the solution of the line.
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you should solve the answer for z not m pls
Step-by-step explanation:
we can factor out z
so that'll be
z((1/m)-(1/n))=1
divide by the value in parentheses on both sides
z=1/((1/m)-(1/n))
I can't tell if there's more the problem wants you to do. I could rewrite the equation on paper more easily, but I don't have one on hand
Answer: The answer is z=1/((1/m)-(1/n). Abhlnav, I'm sorry about not finding the answer to solve for z, and that’s the reason why you told me to solve for z not m to your algebraic expression to find the answer. Are you very good at mathematics, Abhlnav?
Step-by-step explanation:
the ratio of men to women working for a company is 5 to 7. If there are 140 men working for the company, what is the total number of employees?
Answer:
196 women
Step-by-step explanation:
You can do cross multiplication
5/7=140/x
5*7=980
980=5*x
980=5x
196=x
What would be the answee
Determine the expression
trinomial and i believe its a degree of 4
Which line has a slope of 0?
Answer:
y= -5
Step-by-step explanation:
Answer:
y= -5
Step-by-step explanation:
What is the fourth term in a sequence defined by f(n) = 2n?
Answer:
8
Step-by-step explanation:
When we look at sequences, we have the function and we have the sequence, the sequence is f(x)... f(n)... or just f with any variable within a parenthesis right next to it.
What the variable signifies is the value that we will be replaced within the sequence, which is 2n in this case. So by your question, it we are looking for the fourth term, that means f(4) = 2n. Since n is replaced with 4, we do the same with the sequence.
2(4)
Multiply
8
A panel of 12 jurors needs to be selected from a group of 28 people. How many different compositions for the jury are possible?A. 479,001, 600.B. 18, 564.C. 41, 430, 393, 164, 160,000.D. 86, 493, 225.
Complete Question
A panel of 12 jurors needs to be selected from a group of 30 people. How many different compositions for the jury are possible?
A. 479,001, 600.
B. 18, 564.
C. 41, 430, 393, 164, 160,000.
D. 86, 493, 225.
Answer:
The correct option is D
Step-by-step explanation:
From the question we are told that
The number of jurors to be selected is q = 12
The total number of people available n = 30
Generally the number of different compositions for the jury that is possible is mathematically represented as
[tex]N = ^nC_q[/tex]
Here C stands for combination hence we are going to be making use of the combination function in our calculators
[tex]N = ^{30}C_{12}[/tex]
=> [tex]N = 86,493,225[/tex]
James had 568 books to put into 9 boxes. How many books were in each box? Where there any book left that needed another box?
Answer:
63
Step-by-step explanation:
yes when dividing it's a round off number so that means that there's more left over
+87 points and guaranteed brainliest if you get it right :)
If 14x + 6 / 3 = -8 + 4x, what is the value of -3x^2 - 7? TYSM
Which choice represents the expression below as a single exponential
expression?
7^3•7^6
If you are adding them together, the answer would be 7^9
If you are solving the problem, the answer would be 40,353,607
In a salad recipe, the ratio of carrots to cucumbers must remain constant. The table below shows some possible combinations of carrots and cucumbers.
Salad Ingredients
Carrots
Cucumbers
3
9
4
12
6
18
7
21
If only whole vegetables can be used, what is the fewest number of vegetables that can be used to make this salad?
9514 1404 393
Answer:
4
Step-by-step explanation:
The ratio is ...
carrots : cucumbers = 3 : 9 = 1 : 3
The fewest number of vegetables that can be used is 1 carrot and 3 cucumbers, a total of 4 vegetables.
Answer:
4
Step-by-step explanation:
Round to the nearest hundreds place.
There are 324 kids at the County Fair. About how many kids are there?
nearest hundred place : 300
hope this helps
Answer:
300 kids
Step-by-step explanation:
the expected values of two television sets are predicted as follows.(help a sis out)
Answer:
The graph of g(x) has a lesser y intercept
Step-by-step explanation:
Given
f(x) = 100(-x + 4)
Required
Determine the relationship between f(x) and g(x)
First, we need to get the equation of g(x).
From the question, we have that:
Initial Value = 360
Rate = -90 yearly
[It is negative because the rate shows decrement]
Hence, the equation of g(x) is:
g(x) = Initial Value + Rate * x
Where x represents number of years
g(x) = 360 + (-90 * x)
g(x) = 360 - 90x
g(x) = -90x + 360
Recall that
f(x) = 100(-x + 4)
f(x) = -100x + 400
To solve y intercept, we set x = 0.
f(0) = -100 * 0 + 400 = 0 + 400 = 400
g(0) = -90 * 0 + 360 = 0 + 360 = 360
By comparison, the graph of g(x) has a lesser y intercept
To solve x intercept, we set y = 0
For f(x)
0 = -100x + 400
100x = 400
x = 4
For g(x)
0 = -90x + 360
90x = 360
x = 4
By comparison, they have the same x intercepts.
From the list of given options, option A answers the question.
• The packages of henna powder cost $12 each and the squeeze
bottles cost $3 each. What is Sushmila's total cost for the supplies?
Answer:
Step-by-step explanation:
If she is just buying one henna package and one squeeze bottles the total is 12 + 3 which is 15
Answer:
27
Step-by-step explanation:
I got it right
Help I don’t understand this
Answer:
y = 12.5
Step-by-step explanation:
Notice these are similar triangles since they have angles of the same measure (congruent angles), then there must be a proportion among their sides such that:
[tex]\frac{y+5}{5} =\frac{14}{4}[/tex]
therefore by cross-multiplying, we get:
4(y + 5) = 14 * 5
4 y + 20 = 70
4 y = 70 - 20
4 y = 50
y = 12.5
Theo wants to find the surface area and volume of a present he received
Answer:
So whats the question then ????
How is making a table of equivalent ratios to find the unit rate similar to finding the unit rate by calculating with fractions? Use a specific example to explain your reasoning.
Using specific examples, the unit rate can be obtained using equivalent ratio tables and fraction thus :
Table of equivalent ratios :
No of workers : ____ 2 ____ 4 ____ 6 ____ 8
Logs of wood cut: __ 4 ____ 8 ____12 ____16
To obtain the unit rate from the table :
Take the ratio of any pair of values ;
16/8 = 2 logs of wood
Hence, the unit rate is 2 logs of wood per worker.
Using the fractions :
2 worker = 4 logs of wood
1 worker = x
Cross multiply
2x = 4
x = 4/2
x = 2 logs of wood.
Hence, the unit rate is 2 logs of wood per worker.
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x+1/x-4 times 5x/x+1
Answer:
Step-by-step explanation:
How do you create zero pairs using algebra tiles? Add a positive unit tile to a negative unit tile. Add a positive unit tile to a positive unit tile. Add a negative x-tile to a negative x-tile. Add a negative x-tile to a positive unit tile.
Answer:
A: Add a positive unit tile to a negative unit tile.
Step-by-step explanation:
Answer:
The answer is A
Step-by-step explanation:
please help asap question 1 *****
Answer:
(-6, 3)
General Formulas and Concepts:
Algebra I
Solving systems of equations by graphingStep-by-step explanation:
Where the 2 lines intersect is the solution set for the systems of equations.
What’s the answer
5 3/7 - 2 1/5
Answer:3.22
Step-by-step explanation:
Hope this helps
See attachment for math work and answer.
If ∠ + ∠ = 180° and ∠ ≅ ∠, what can you conclude about ∠ and ∠?
Answer:
both ∠=90
Step-by-step explanation:
180/2=90
Need help asap
Graph f(x) = 3x + 4 and h(x) = f(x) +1
The coordinate points to plot on the graph are (0, 5) and (1, 8). The graph for the given functions are plotted below.
The given functions are f(x) = 3x + 4 and h(x) = f(x) +1.
What is the function?Functions are the fundamental part of the calculus in mathematics. The functions are the special types of relations. A function in math is visualized as a rule, which gives a unique output for every input x.
Here, h(x)=3x+5
The graph of f(x) = 3x + 4 is as follows:
Graph the line using the slope and y-intercept, or two points.
Slope: 3
y-intercept: (0, 4)
The coordinate points to plot on the graph are (0, 4) and (1, 7)
The graph of h(x)=3x+5 is as follows:
Graph the line using the slope and y-intercept, or two points.
Slope: 3
y-intercept: (0, 5)
The coordinate points to plot on the graph are (0, 5) and (1, 8)
The coordinate points to plot on the graph are (0, 5) and (1, 8). The graph for the given functions are plotted below.
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HELP ME OUT PLEASEEEEEEEEEEEEEEEEE
The awnser is 5/8
hope that helps
x - 2y = - 7:(.3), (-9, )
Answer:
{x,y}={1,−3}
Step-by-step explanation:
The sales tax rate is 4%. If Miguel buys a silver coat rack priced at $594, how much tax will he pay?
Answer:
$319,000
Step-by-step explanation:
