Answer:
Step-by-step explanation:
In a pictogram, data can be arranged as follows:
The organization is given in a Cartesian plane, with a vertical and a horizontal axis, images can be introduced. An independent variable is placed on the horizontal axis, usually small numbers. The dependent variable can be placed on the vertical axis, they are usually larger numbers.
The Sugar Sweet Company is going to transport its sugar to market. It will cost $3500 to rent trucks, and it will cost an additional $150 for each ton of sugar transported. Let C represent the total cost (in dollars), and let S represent the amount of sugar (in tons) transported. Write an equation relating C to S. Then use this equation to find the total cost to transport 17 tons of sugar.
Answer:
C = 150S + 3,500.
$6,050.
Step-by-step explanation:
It costs $3,500 to rent the trucks, so your constant/y-intercept will be $3,500.
It will cost $150 for every ton of sugar, so your slope will be $150.
You then have your equation:
C = 150S + 3,500.
If you were to transport 17 tons of sugar...
C = 150 * 17 + 3,500
C = 2,550 + 3,500
C = $6,050.
Hope this helps!
Answer:
C = $6050
Equation:
To write the equation, we have to remember that C is the total cost, so that means the equation should end in "= C". S is the amount of sugar, so the equation would look something like this:
[tex]3500+150(S)=C[/tex]
3500 is at the beginning since that is the cost for the trucks, and each ton of sugar costs $150, and that would get multiplied by S amount of sugar, to get the total cost, C.
Solving the equation
To solve the equation when S = 17, we simply have to plug in S as 17 into our equation we wrote above.
[tex]3500+150(17)=C[/tex]
150 * 17 is 2550, and 3500 + 2550 is 6050, which is C.
C = $6050
Help ASAP - Find the area of the composite figure made up of a square and a semicircle. Use 3.14 as an approximation for and give your
answer to the nearest square inch. Enter only the number.
Answer:
200.52 in^2
Step-by-step explanation:
to find the area of a circle, you square 6 and multiply it by pi in this case 3.14.
that gives you 113.04 but because this is only a half circle, it is 56.52 in^2.
Next, you need to find the rectangle. multiply 12(length) by 12(Width) to get 144 add 144 to 56.52 to get 200.52.
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If a dozen eggs cost $1.35, what is the unit cost?
A) $0.11
B) $0.13
C) $1.23
D) $4.29
Answer:
A) $0.11
Step-by-step explanation:
Since a dozen (12) eggs cost $1.35. You will divide $1.35 by 12. And it will equal 0.1125. Round it up it equals to 0.11.
this graph shows the solution to which inequality?
Answer:
B. y > 2/3x + 1
Step-by-step explanation:
To find slope we'll use the following formula,
[tex]\frac{y^2-y^1}{x^2-x^1}[/tex]
(-3,-1) (3,3)
3 - -1 = 4
3 - -3 = 6
2/3x
The y intercept is 1,
we know this because that's the point the line touches the y axis.
Thus,
the answer is B. y > 1/3x + 1.
Hope this helps :)
The graph of the solution of an inequality is given .
The graph represents the inequality is [tex]y>\frac{2}{3} x+1[/tex]
Option B
Given :
The graph of an inequality. To find the inequality for the given graph we use linear equation [tex]y=mx+b[/tex]
where m is the slope and b is the y intercept
To find out slope , pick two points from the graph
(-3,-1) and (3,3)
[tex]slope =\frac{y_2-y_2}{x_2-x_1} =\frac{3+1}{3+3} =\frac{2}{3} \\m=\frac{2}{3}[/tex]
Now we find out y intercept b
The point where the graph crosses y axis is the y intercept
The graph crosses y axis at 1
so y intercept b=1
The linear equation for the given graph is
[tex]y=\frac{2}{3} x+1[/tex]
Now we frame the inequality . we use test point that lies inside shaded region
Lets take (4,5)
[tex]y=\frac{2}{3} x+1\\5=\frac{2}{3} (4)+1\\5=3.6\\5>3.6\\y>\frac{2}{3} x+1[/tex]
The inequality for the given graph is
[tex]y>\frac{2}{3} x+1[/tex]
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suppose that two integers from the set of 8 integers {1,2,… ,8} are choosen at random. Find the probability that
i.5 and 8 are picked.
ii.Both numbers match.
iii.Sum of the two numbers picked is less than 4.
Answer:
Ok so we have a set of 8 numbers {1,2,...,8}
a) 5 and 8 are picked.The probability here is:
In the first selection we can pick 5 or 8, so we have two possible outcomes out of 8 total outcomes, then the probability for the first selection is:
P = 2/8 = 1/4.
Now, if one of those numbers was picked in the first selection, only one outcome is possible in this second selection, (if before we picked a 5, here we only can pick an 8)
Then the probability is:
P = 1/8
The joint probability is equal to the product of the individual probabilities, so here we have:
P = (1/4)*(1/8) = 1/32 = 0.003
b) The numbers match:
In the first selection we can have any outcome, so the probability is:
P = 8/8 = 1
Now, based on the previous outcome, in the second selection we can have only one outcome, so here the probability is:
P = 1/8 = 0.125
The joint probability is p = 1/8
c) The sum is smaller than 4:
The combinations are:
1 - 1
1 - 2
2 - 1
We have 3 combinations, and the total number of possible combinations is:
8 options for the first number and 8 options for the second selection:
8*8 = 64
The probabilty is equal to the number of outcomes that satisfy the sentence divided by the total numberof outcomes:
P = 3/64 = 0.047
Using the probability concept, it is found that there is a:
i. 0.03125 = 3.125% probability that 5 and 8 are picked.
ii. 0.125 = 12.5% probability that both numbers match.
iii. 0.046875 = 4.6875% probability that the sum of the two numbers picked is less than 4.
A probability is the number of desired outcomes divided by the number of total outcomes.
In this problem, two integers are chosen from a set of 8, hence, there are [tex]8^2 = 64[/tex] total outcomes.
Item i:
Two outcomes result in 5 and 8 being picked, (5,8) and (8,5), hence:
[tex]p = \frac{2}{64} = 0.03125[/tex]
0.03125 = 3.125% probability that 5 and 8 are picked.
Item ii:
8 outcomes result in both numbers matching, (1,1), (2,2), ..., (8,8), hence:
[tex]p = \frac{8}{64} = 0.125[/tex]
0.125 = 12.5% probability that both numbers match.
Item ii:
Three outcomes result in a sum of less than 2, (1,1), (1,2), (2,1), hence:
[tex]p = \frac{3}{64} = 0.046875[/tex]
0.046875 = 4.6875% probability that the sum of the two numbers picked is less than 4.
A similar problem is given at https://brainly.com/question/15536019
Help anyone????? (this is due today)
Answer: not enough data shown to proceed with this question
Step-by-step explanation:
helppppppppp pleaseeeeeeeeeeeeeee
Answer:
Number is yellow box=3
Step-by-step explanation:
We know this because the way we get that number is subtracting the two numbers above it, which is 8 and 5, which give us 3.
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Consider the function f(x) = 2x and the function g(x) shown below. How will the graph of g(x) differ from the graph of f(x)? G(x)=2f(x)=2(2^x))
Answer:
The graph of g( x ) is the graph of f(x) stretched vertically by a factor of 2.
Option C is the correct option.
Step-by-step explanation:
Solution,
f ( x ) = 2ˣ
g ( x ) = 2 ( 2 ˣ )
2 is multiplied with f(x)
2 is greater than 1
so, Vertical stretch by a factor of 2.
Option C is correct.
Hope this helps...
Best regards!!
We want to compare the functions f(x) and g(x), given that we know that g(x) is a transformation of f(x).
The correct option is B, "the graph of g(x) is the graph of f(x) stretched vertically by a scale factor of 2."
Here we know that:
f(x) =2^x
g(x) = 2*f(x) = 2*2^x
First, remember that a general vertical dilation/stretch of scale factor k is written as:
g(x) = k*f(x)
So only by that and knowing that g(x) = 2*f(x), we can conclude that the graph of g(x) is the graph of f(x) dilated/stretched vertically by a scale factor of 2.
Then the correct option is B, "the graph of g(x) is the graph of f(x) stretched vertically by a scale factor of 2."
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Use Demoivres Theorem to find (-square root 3 +i)^6
Answer:
[tex]z=(-\sqrt{3}+i)^6[/tex] = -64
Step-by-step explanation:
You have the following complex number:
[tex]z=(-\sqrt{3}+i)^6[/tex] (1)
The Demoivres theorem stables the following:
[tex]z^n=r^n(cos(n\theta)+i sin(n\theta))[/tex] (2)
In this case you have n=6
In order to use the theorem you first find r and θ, as follow:
[tex]r=\sqrt{3+1}=2\\\\\theta=tan^{-1}(\frac{1}{\sqrt{3}})=30\°[/tex]
Next, you replace these values into the equation (2) with n=6:
[tex]z^6=(2)^6[cos(6*30\°)+isin(6*30\°)]\\\\z^6=64[-1+i0]=-64[/tex]
Then, the solution is -64
Answer:
A) -64
Step-by-step explanation:
Edge 2021
Mariam went to a shop and bought 8 snickers, 3 galaxy and 3 kitkat. She payed 8 BD
totally. Her friend Zainab bought 4 snicker, 9 galaxy and 4 kitkat. She payed 10.9BD.
Is it possible to know the cost of each chocolate mathematically?
If yes how. If not why?
Answer:
Yes
Step-by-step explanation:
Let s be the price of snickers, g the price of galaxy and k the price of kitkat.
●For Mariam the equation will be:
8 s + 3 g + 3k = 8
●For Zainab the equation will be:
4 s + 9 g + 4 k = 10.9
Take the first equation and divide both sides by 4 to make it easier.
You get:
● 2s + 0.75 g + 0.75k = 2
Take the second equation and divide both sides by 2 to make easier.
You get:
● 2s + 4.5g + 2k = 5.45
The new system of equation is:
● 2s +0.75g + 0.75k = 2
● 2s + 4.5g + 2k = 5.45
Express s in the first equation using the other variables.
● 2s +0.75g +0.75k = 2
● 2s + 0.75(g+k) = 2
● 2s = 2-0.75(g+k)
● s = 1- 0.325 (g+k)
Replace s by the new expression in the second equation:
●2 [1-0.325(g+k)] +4.5 g +2k = 5.45
●2-0.75(g+k) +4.5g + 2k = 5.45
●2- 0.75g -0.75k +4.5 g +2k = 5.45
●2+ 3.75g + 1.25k = 5.45
● 3.75g +1.25k = 3.45
We have eliminated one variable (s)
We will keep (3.75g+1.25k=3.45) and use it.
Now that we eliminated in the second equation do it again in the first one.
You will get a system of equations with two variables.
Solve it and replace g and k with the solutions.
Finally solve the equation and find s.
20 POINTS AND BRAINLEST A sample of restaurants in a city showed that the average cost of a glass of iced tea is $1.25 with a standard deviation of 7¢. If a new restaurant charges a price for iced tea that has a z-value of -1.25, then what is the tea’s actual cost? a. $1.00 c. $1.16 b. 89¢ d. $2.00 A student took two national standardized tests while applying for college. On the first test, SEE IMAGE. If he scored 630 on the first test and 45 on the second test, on which test did he do better? a. first test b. second test
Answer:
1) [tex] x= \mu +z\sigma = 1.25 -1.25*0.07= 1.16[/tex]
The best answer woud be:
c. $1.16
2) If we find the z score for the first test we got:
[tex] z=\frac{630-475}{75}= 2.07[/tex]
And for the second test:
[tex] z=\frac{45-32}{6}= 2.17[/tex]
The z score for the second test is greater so then the answer would be:
b. second test
Step-by-step explanation:
For the first question:
For this case we have the following parameters are:
[tex]\mu = 1.25 , \sigma =0.07[/tex]
And we also know that the z score is [tex] z=-1.25[/tex] and we can use the z score formula given by:
[tex] z=\frac{X -\mu}{\sigma}[/tex]
And solving for x we got:
[tex] x= \mu +z\sigma = 1.25 -1.25*0.07= 1.16[/tex]
The best answer woud be:
c. $1.16
For the second question:
First test [tex]\mu = 475, \sigma =75[/tex]
Second test [tex] \mu= 32, \sigma=6[/tex]
630 for the first test and 45 for the second
If we find the z score for the first test we got:
[tex] z=\frac{630-475}{75}= 2.07[/tex]
And for the second test:
[tex] z=\frac{45-32}{6}= 2.17[/tex]
The z score for the second test is greater so then the answer would be:
b. second test
Solve for x.
a) 5√12
b) 12√5
c) 33
d) 6√5
Answer:
b
Step-by-step explanation:
Altitude- 0n- hypotenuse theorem
(leg of big Δ )² = ( part of hypotenuse below it ) × ( whole hypotenuse ), that is
x² = (30 - 6) × 30 = 24 × 30 = 720 ( take square root of both sides )
x = [tex]\sqrt{720}[/tex]
= [tex]\sqrt{144(5)}[/tex] = [tex]\sqrt{144}[/tex] × [tex]\sqrt{5}[/tex] = 12[tex]\sqrt{5}[/tex] → b
I need the co-ordinates to answer this can anyone give them to me? If not it's fine! :)
Hi there!
Answer:
Find points for the equation y = 2x + 1 by plugging in x values:
For example, when x = 1, substitute in the value of 'x' into the equation:
y = 2(1) + 1
y = 2 + 1
Solve for the y-value:
y = 3
Repeat this process for multiple points:
X Y
-2 -3
-1 -1
0 1
1 3
2 5
To get the graph of y = 2x + 1, simply graph these points. :)
If ABCD is a parallelogram, AD = 14, EC = 11, mZABC = 64°, mZDAC = 71°, and mZBDC = 25,
find each measure.
А
a) BC =
d) mZABD =
B
b) AC =
e) m ACD =
E
D
С
c) m DAB
f) mZADB =
Find attached to this answer the diagram of the Quadrilateral
Question:
If ABCD is a parallelogram, AD = 14, EC = 11, m∠ABC = 64°, m∠DAC = 71°, and m∠BDC = 25, find each measure.
a) BC =
b) AC =
c) m∠DAB =
d) m∠ABD =
e) m∠ACD =
f) m∠ADB =
Answer:
a) BC = 11
b) AC = 22
c) m∠DAB = 116°
d) m∠ABD = 39°
e) m∠ACD = 45°
f) m∠ADB = 25°
Step-by-step explanation:
a) BC
In the question above, EC = 11
We can see that EC and BC are equal sides of a diagonal line that has been divided into two equal parts in a Quadrilateral.
Hence, In a quadrilateral ABCD,
EC = BC
Hence BC = 11
b) AC
AC is one of the diagonal lines that divided parallelogram ABCD
AC = BC + EC
AC = 11 + 11
AC = 22
c) m∠DAB
m∠ABC = 64°
m∠ADC = 64°
For the two angles above, a diagonal bisects through those angles.
Also the sum of angles in a triangle = 180°
Hence,
180° = 1/2m∠ABC + 1/2m∠ADC +
m∠DAB
m∠DAB = 180° - ( 1/2 (64) + 1/2(64))
m∠DAB = 180 ° - 64°
m∠DAB = 116°
d) m∠ABD
Since,
m∠ABC = 64° and m∠BDC = 25
m∠ABC = m∠BDC + m∠ABD
64 = 25+ m∠ABD
m∠ABD = 64° - 25°
m∠ABD = 39°
e) m∠ACD
In the above question,
m∠ABC = 64°,
m∠ADC = m∠ABC, this is because, opposite angles in a quadrilateral are congruent and equal to each other.
Hence, m∠ADC = 64°
m∠DAC = 71°,
In a triangle , all the angles in a triangle = 180°
Hence,
180° = m∠DAC + m∠ADC + m∠ACD
180° = 71° + 64 ° + m∠ACD
m∠ACD = 180° -(71 + 64)°
m∠ACD = 180° - 135°
m∠ACD = 45°
f) m∠ADB
Since
m∠DAB = 116°
m∠ABD = 39°
The sum of angles in a triangle = 180°
180° = m∠ABD + m∠DAB + m∠ADB
180° = 39 ° + 116° + m∠ADB
m∠ADB = 180° - ( 116 + 39)°
m∠ADB = 25 °
a) BC = 11
b) AC = 22
c) m∠DAB = 116°
d) m∠ABD = 39°
e) m∠ACD = 45°
f) m∠ADB = 25°
Given : AD=14 , EC=11, m∠ABC= 64°, m∠DAC=71° and m∠BDC=25°
To find: BC =? , AC =? , m∠DAB =?, m∠ABD =? ,m∠ACD =? ,m∠ADB =?
Consider the figure given below ABCD is a parallelogram
To find a) BC
Given, EC = 11
As seen in figure that EC and BC are equal sides of a diagonal line that has been divided into two equal parts in a Parallelogram.
Hence, In a Parallelogram ABCD,
EC = BC
Hence BC = 11
To find b) AC
AC is one of the diagonal lines that divided parallelogram ABCD
AC = BC + EC
AC = 11 + 11
AC = 22
To find c) m∠DAB
Given, m∠ABC = 64°
m∠ADC = 64°
(For the two angles above, a diagonal bisects through those angles)
Also From Angle sum property;
Hence,
180° = 1/2m∠ABC + 1/2m∠ADC + m∠DAB
m∠DAB = 180° - ( 1/2 (64) + 1/2(64))
m∠DAB = 180 ° - 64°
m∠DAB = 116°
To find d) m∠ABD
Since,
m∠ABC = 64° and m∠BDC = 25
m∠ABC = m∠BDC + m∠ABD
64 = 25+ m∠ABD
m∠ABD = 64° - 25°
m∠ABD = 39°
To find e) m∠ACD
Given, m∠ABC = 64°;
m∠ADC = m∠ABC, this is because, opposite angles in a quadrilateral (here parallelogram) are congruent and equal to each other
Hence, m∠ADC = 64°
m∠DAC = 71°,
In a triangle , all the angles in a triangle = 180°(Angle sum property)
Hence,
180° = m∠DAC + m∠ADC + m∠ACD
180° = 71° + 64 ° + m∠ACD
m∠ACD = 180° - (71 + 64)°
m∠ACD = 180° - 135°
m∠ACD = 45°
To find f) m∠ADB
Since ,m∠DAB = 116° and m∠ABD = 39°
From Angle sum property;
180° = m∠ABD + m∠DAB + m∠ADB
180° = 39 ° + 116° + m∠ADB
m∠ADB = 180° - ( 116 + 39)°
m∠ADB = 25 °
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Cynthia invested $12,000 in a savings account. If the interest rate is 6%, how much will be in the account in 10 years by compounding continuously? Round to the nearest cent.
Answer:
In 10 years she'll have approximately $21865.4 in her account.
Step-by-step explanation:
When an amount is compounded continuously its value over time is given by the following expression:
[tex]v(t) = v(0)*e^{rt}[/tex]
Applying data from the problem gives us:
[tex]v(10) = 12000*e^{(0.06*10)}\\v(10) = 12000*e^{0.6}\\v(10) = 21865.4[/tex]
In 10 years she'll have approximately $21865.4 in her account.
Answer:
21,865.43
previous answer left out the last digit
Step-by-step explanation:
The triangles in the diagram are congruent. If mF = 40°, mA = 80°, and mG = 60°, what is mB?
Answer:
40
Step-by-step explanation:
The measure of m∠B in the triangle is 40°.
What is a triangle?A triangle is a 2-D figure with three sides and three angles.
The sum of the angles is 180 degrees.
We can have an obtuse triangle, an acute triangle, or a right triangle.
We have,
Since the triangles are congruent, we know that their corresponding angles are congruent as well.
Therefore, we have:
m∠B = m∠F = 40°.
Note that we also have:
m∠C = m∠A = 80° (by corresponding angles)
m∠H = m∠G = 60° (by corresponding angles)
Finally, we can use the fact that the sum of the angles in a triangle is 180° to find the measure of angle D:
m∠D = 180° - m∠B - m∠C = 180° - 40° - 80° = 60°.
Therefore,
m∠B = 40°.
Learn more about triangles here:
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what is the length of bc in the right triangle below?
Answer: A) 15
Step-by-step explanation:
Because of Pythagorean Theorem, 9^2+12^2=BC^2. Thus, 81+144=BC^2. Thus, 225=BC^2. Thus, 15=BC.
Hope it helps, and ask if you want further clarification <3
ANSWER ASAP. Which number line correctly shows –3 – 1.5? A number line going from negative 4.5 to positive 4.5. An arrow goes from 0 to negative 3 and from negative 3 to negative 4.5. A number line going from negative 4.5 to positive 4.5. An arrow goes from 0 to 3 and from 3 to 4.5. A number line going from negative 4.5 to positive 4.5. An arrow goes from negative 3 to negative 1.5 and from 0 to negative 3. A number line going from negative 4.5 to positive 4.5. An arrow goes from negative 1.5 to 1.5 and from 0 to negative 1.5.
Answer:
An arrow goes from 0 to negative 3 and from negative 3 to negative 4.5
Step-by-step explanation:
Start at 0 and move 3 units to the left since it is negative
Move 1.5 units to the left since we are subtracting
We end up at - 4.5
Answer:
An arrow goes from 0 to negative 3 and from negative 3 to negative 4.5
Step-by-step explanation:
-3 is also 0-3
arrow goes from 0 to -3 backwards.
arrow goes from -3 to -4.5 because -3-1.5=-4.5
Which equation represents the line that is parallel to y=4 and passes through (-3,1).
A. x=1
B. x= 3
C. y= 1
D. y= 4x + 13
Answer:
C. y = 1
Step-by-step explanation:
For two line to be parallel, they have to have the same slope. The slope for the equation y = 4 is 0. This cancels out answer choices A, B, and D.
A and B have an undefined slope since they are vertical lines.
D has a slope of 4.
Also, the line has to go through the point (-3, 1). Since the line has a slope of 0, the equation will include the y-value. The y-value for this point is 1. This gives you an answer of y = 1.
Answer:
y = 1
Step-by-step explanation:
Just took the practice test and got it right
the Average temperature for one week in Alaska are as follows 10, 6, 9, 6, 2, 0, 3. what is the mean of thes temperatures? show all work.
Answer:
5 1/7
Step-by-step explanation:
To find the mean, add up all the numbers and then divide by the number of numbers
(10+ 6+ 9+ 6+ 2+ 0+ 3)/7
The sum of all the numbers is 36 and there are 7 numbers
36/7 =
7 goes into 36 five times with 1 left over
5 1/7
Answer:
5.143
Step-by-step explanation:
Add them all up then divide by the amount of numbers there are.
The center of a circle is at the origin on a coordinate grid. A line with a positive slope intersects the circle at (0,7).
Which statement must be true?
The circle has a radius greater than 7.
The circle has a radius equal to 7.
The slope of the line is equal to 7.
The slope of the line is not equal to 7.
Save and Exit
Next
Submit
Answer:
the radius of the circle =7
Step-by-step explanation:
the function of a circle:(x – h)^2 + (y – k)^2 = r^2
center(0,0) because the center of a circle is at the origin (h,k)
a line intersect at (0,7)
(0-0)^+7-0)^2=r^2
r^2=49 , r=√49
radius r=7
Find the height of a square pyramid that has a volume of 32 cubic feet and a base length of 4 feet
The volume of a square pyramid is found by multiplying the area of the base by the height divided by 3.
32 = 4^2 x h/3
32 = 16 x h/3
Multiply both sides by 3
96 = 16 x h
Divide both sides by 16
H = 96/16
H = 6
The height is 6 feet
Answer:
6 ft
Step-by-step explanation:
Volume of the pyramid:
V= lwh/3, where l- base length, w- base width, h- heightGiven
V= 32 ft³l=w= 4 fth=?Then, as per formula, we can solve it for h:
32= 4×4×h/3h= 32×3/16h= 6 ftHeight of the pyramid is 6 ft
Please answer this correctly without making mistakes
Shortest is Vindale to Wildgrove to Clarksville
18.9 + 13.2 = 32.1 km.
Six friends, four boys and two girls, went to a movie theater. They wanted to sit in a way so no girl sits on either first or last chair. How many such arrangements are possible?
Answer:
288 possible seating arrangements.
Step-by-step explanation:
There are 4 possible choices for the first seat.
There are 3 possible choice for the sixth seat.
There are 4 possible choices for the second seat.
There are 3 possible choices for the third seat.
There are 2 possible choices for the fourth seat
There is only 1 possible choices for the fifth seat.
4×3×4×3×2×1=
12×4×3×2×1=
48×3×2×1=
144×2×1=
288×1=
288 possible seating arrangements.
Math problem help me please
Answer:
X+3=-5
Step-by-step explanation:
Once you solve the initial equation for x, you will find that the value for x is -8. You can confirm this by doing 2^-5, which will in turn give you 1/32.
Once you know the value of x, you can plug it into the equation and see which one is true, which in this case is the first one, because -8+3 gives you -5
A group of engineers developed a new design for a steel cable. They need to estimate the amount of weight the cable can hold. The weight limit will be reported on cable packaging. The engineers take a random sample of 48 cables and apply weights to each of them until they break. The 48 cables have a mean breaking weight of 773 lb. The standard deviation of the breaking weight for the sample is 16.1 lb. Find the 95% confidence interval to estimate the mean breaking weight for this type cable.
Answer:
The 95% confidence interval is [tex]768.44 < \mu <777.55[/tex]
Step-by-step explanation:
From the question we are told that
The sample size is n = 48
The sample mean is [tex]\= x = 773 \ lb[/tex]
The standard deviation is [tex]\sigma = 16.1 \ lb[/tex]
Now given that the confidence level is 95% , then the level of significance is mathematically represented as
[tex]\alpha = 100 - 95[/tex]
[tex]\alpha = 5 \%[/tex]
[tex]\alpha = 0.05[/tex]
Next we obtain the critical value of [tex]\frac{\alpha }{2}[/tex] from the normal distribution table , the value is
[tex]Z_{\frac{\alpha }{2} } = 1.96[/tex]
The reason we are obtaining critical values of [tex]\frac{\alpha }{2}[/tex] instead of [tex]\alpha[/tex] is because
[tex]\alpha[/tex] represents the area under the normal curve where the confidence level interval ( [tex]1-\alpha[/tex] ) did not cover which include both the left and right tail while
[tex]\frac{\alpha }{2}[/tex]is just the area of one tail which what we required to calculate the margin of error
The margin of error is mathematically represented as
[tex]MOE = Z_{\frac{\alpha }{2} } * \frac{\sigma }{ \sqrt{n} }[/tex]
substituting values
[tex]MOE = 1.96 * \frac{ 16.1 }{ \sqrt{48} }[/tex]
[tex]MOE = 4.555[/tex]
The 95% confidence interval to estimate the mean breaking weight for this type cable is mathematically evaluated as
[tex]\= x - MOE < \mu < \= x - MOE[/tex]
substituting values
[tex]773 - 4.555 < \mu < 773 + 4.555[/tex]
[tex]768.44 < \mu <777.55[/tex]
Find the expression for h(x) f(x)=-x^2-1
Answer:
h(x) = -x^2 - 1
Step-by-step explanation:
well y, h(x), f(x), n(x), or any other something of x is all the same thing y.
So if f(x) is -x^2 - 1,
Then h(x) is also -x^2 - 1
A jury pool consists of 27 people, 14 men and 13 women. Compute the probability that a randomly selected jury of 12 people is all male
Answer: [tex]\dfrac{7}{1,337,220}=5.2\times 10^{-6}[/tex]
Step-by-step explanation:
Order does not matter so it is a Combination.
There are 14 men and we are going to choose 12 --> ₁₄C₁₂
There are 27 people and we are going to choose 12 --> ₂₇C₁₂
[tex]\dfrac{_{14}C_{12}}{_{27}C_{12}}\rightarrow\dfrac{14!}{(14-12)!}\div \dfrac{27!}{(27-12)!}=\large\boxed{\dfrac{7}{1,337,220}}[/tex]
Probabilities are used to determine the chances of an event
The probability of selecting 12 males is: [tex]\frac{7}{1337220}[/tex]
The parameters are given as:
[tex]n = 24[/tex] --- sample size
[tex]Male = 14[/tex]
[tex]Female = 13[/tex]
[tex]r = 12[/tex] ---- number of jury pool
The number of ways of selecting 12 members of the jury, from a total of 27 is:
[tex]^nC_r = \frac{n!}{(n - r)!r!}[/tex]
So, we have:
[tex]^{27}C_{12} = \frac{27!}{(27 - 12)!12!}[/tex]
[tex]^{27}C_{12} = \frac{27!}{15! \times 12!}[/tex]
[tex]^{27}C_{12} = 17383860[/tex]
The number of ways of selecting 12 members of the jury, from a total of 14 male is:
[tex]^nC_r = \frac{n!}{(n - r)!r!}[/tex]
So, we have:
[tex]^{14}C_{12} = \frac{14!}{(14 - 12)!12!}[/tex]
[tex]^{14}C_{12} = \frac{14!}{2! \times 12!}[/tex]
[tex]^{14}C_{12} = 91[/tex]
So, the probability of selecting 12 males is:
[tex]Pr = \frac{^{14}C_{12}}{^{27}C_{12}}[/tex]
[tex]Pr = \frac{91}{17383860}[/tex]
Simplify
[tex]Pr = \frac{91/13}{17383860/13}[/tex]
[tex]Pr = \frac{7}{1337220}[/tex]
Hence, the required probability is: [tex]\frac{7}{1337220}[/tex]
Read more about probabilities at:
https://brainly.com/question/11234923
When randomly selecting an adult, let B represent the event of randomly selecting someone with type B blood. Write a sentence describing what the rule of complements below is telling us. P B or B = 1 Choose the correct answer below. A. It is impossible that the selected adult has type B blood or does not have type B blood. B. It is certain that the selected adult has type B blood. C. It is certain that the selected adult has type B blood or does not have type B blood. D. It is certain that the selected adult does not have type B blood.
Answer: The rule of complements is apprising us that, the person selected will.eithwr have a type B blood or will not have a type B blood
Step-by-step explanations:
Find explanations in the attachment
Assume that a sample is used to estimate a population proportion μ . Find the margin of error M.E. that corresponds to a sample of size 722 with a mean of 54.2 and a standard deviation of 13.1 at a confidence level of 90%.
Answer:
[tex]MoE = 1.645\cdot \frac{13.1}{\sqrt{772} } \\\\MoE = 1.645\cdot 0.47147\\\\MoE = 0.776\\\\[/tex]
Step-by-step explanation:
Since the sample size is quite large, we can use the z-distribution.
The margin of error is given by
[tex]$ MoE = z_{\alpha/2}(\frac{s}{\sqrt{n} } ) $[/tex]
Where n is the sample size, s is the sample standard deviation and [tex]z_{\alpha/2}[/tex] is the z-score corresponding to a 90% confidence level.
The z-score corresponding to a 90% confidence level is
Significance level = α = 1 - 0.90= 0.10/2 = 0.05
From the z-table at α = 0.05
z-score = 1.645
[tex]MoE = 1.645\cdot \frac{13.1}{\sqrt{772} } \\\\MoE = 1.645\cdot 0.47147\\\\MoE = 0.776\\\\[/tex]
Therefore, the margin of error is 0.776.