Answer:
20x + 16
Step-by-step explanation:
Width (w) = 7x - 2
Length (l) = 3x + 10
Perimeter = 2*(l + w)
= 2* (3x + 10 + 7x - 2)
= 2* (3x + 7x + 10 - 2 ) {Combine like terms}
= 2* ( 10x + 8) {Use distributive property: a(b +c) =(a*b) + (a*c)}
= 2*10x + 2*8
= 20x + 16
Find measure of angle A
Answer:
angel a is 65 degrees
Step-by-step explanation:
40+2x+10=180
40-40+2x+10-10=180-40-10
2x=130
x=65
checking:
65 + 10 + 40 = 75 + 40 = 115
115+65=180
180=180
An interval estimate for the average amount of money spent by Australian students on subscription based entertainment platforms in a week was reported to be $32468 to $37224. This interval estimate was based on a sample of 48 students. The variance of the population was determined from previous studies to be $44582179 squared. What level of confidence can be attributed to this interval estimate? State your answer as a percentage, correct to the nearest whole number.
The level of confidence that can be attributed to the interval estimate is approximately 97%. This means that we can be 97% confident that the true average amount of money spent by Australian students on subscription-based entertainment platforms falls within the range of $32,468 to $37,224.
To determine the level of confidence for the interval estimate, we need to consider the t-distribution and the degrees of freedom associated with the sample size.
Since the sample size is 48, the degrees of freedom would be 48 - 1 = 47. Using a t-distribution table or calculator, we can find that with 47 degrees of freedom, a confidence level of approximately 97% corresponds to a t-value of 2.682.
Since the interval estimate is not explicitly provided, we can assume it to be the range between $32,468 and $37,224.
We have that the t-value is associated with a two-tailed test, the level of confidence for this interval estimate is approximately 97%.
Therefore, we can attribute a confidence level of 97% to this interval estimate, indicating that we can be 97% confident that the true average amount of money spent by Australian students on subscription-based entertainment platforms falls within the given range.
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The ratio of cement to gravel in a road
surface is 3:17. Find the percent
of cement in the mixture.
Let A = {1,3,5,7). B = {5, 6, 7, 8). C = {5, 8} D = (2,5,8), and U = {1,2,3,4,5,6,7,8). Determine whether the expression shown below is true or false. If it is false, then give the reaso DCB . O A. False; the sets must have the same number of elements. B. False; all elements in D are not in B O C. True OD. False; all elements in D are in B O E. None of the above
The statement is False.
Let A = {1,3,5,7). B = {5, 6, 7, 8). C = {5, 8} D = (2,5,8), and U = {1,2,3,4,5,6,7,8).
To determine whether the expression DCB is true or false, we need to know the content of these sets.
To determine the content of DCB:
DCB contains all elements of D, all elements of C, and all elements of B except those that are already in D and C.
D = {2,5,8} C = {5, 8} B = {5,6,7,8}
DCB = {2,5,8,6,7}
Thus, DCB is false because not all elements in D are in B, and all elements in D are not in B.
Therefore, the answer is option B.False; all elements in D are not in B.
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Need some help with Algebra!
Today's my last day to get missing work in and I currently have an F in Math and I'm just trying to get it up so I don't fail. Help me out? Heres the picture:
The system represented by the graph is y ≤ 1/2x + 3 and y < -2x + 8
The point (4, 0) is not a solution to the system
Constructing the system represented by the graphFrom the question, we have the following parameters that can be used in our computation:
The graph
On the graph there are two inequalities and they are calculated as follows:
A linear equation is represented as
y = mx + c
Where
c = y when x = 0
So, we have
y = mx + 3
y = mx + 8
Using the points on the graphs, we have
y = mx + 3 ⇒ -6m + 3 = 0 ⇒ m = 1/2
y = mx + 8 ⇒ 4m + 8 = 0 ⇒ m = -2
So, we have
y = 1/2x + 3
y = -2x + 8
Represent as inequalities
y ≤ 1/2x + 3
y < -2x + 8
Is (4, 0) a solution to the systemFrom the graph the point (4, 0) is out of the shaded region
This means that the point (4, 0) is not a solution to the system
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sketch a graph of f(t), express the function f(t) in terms of the heaviside function u(t −a), and find the laplace transform l{f(t)}.
(a) f(t) = {sint 0 ≤ t < π {0 π ≤ t
(b) f(t) = {0 0 ≤ t <3
{t² 3 ≤ t
(a) To sketch the graph of f(t) = {sin(t) 0 ≤ t < π, 0 π ≤ t}, we can observe that the function is equal to zero for t greater than or equal to π. Thus, the graph of f(t) consists of a sine wave from 0 to π, and then it becomes zero from π onwards.
(b) To express f(t) in terms of the Heaviside function u(t - a), we can write f(t) as {0 0 ≤ t < 3, t² 3 ≤ t}. This means that for t less than 3, the function is zero, and for t greater than or equal to 3, the function is t squared. We can rewrite this using the Heaviside function as f(t) = t²u(t - 3).
To find the Laplace transform L{f(t)}, we can apply the Laplace transform to each part of the function separately. Using the Laplace transform properties, we have L{f(t)} = L{t²u(t - 3)}. By applying the time-shifting property, the Laplace transform of t²u(t - 3) is given by L{t²u(t - 3)} = e^(3s)/s^3, where s represents the Laplace variable.
The graph of f(t) consists of a sine wave from 0 to π, and then it becomes zero from π onwards. The function f(t) can be expressed as f(t) = t²u(t - 3) using the Heaviside function. The Laplace transform of f(t) is L{f(t)} = e^(3s)/s^3.
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Plz help!! Dont answer if you cant help
Answer:
94.88 cubic units
Step-by-step explanation:
Volume of the prism = Area of base * Height
[tex] = 5( \frac{1}{2} \times 2.75 \times 4) \times 3.45 \\ \\ = 5 \times 2.75 \times 2 \times 3.45 \\ \\ = 10\times 2.75 \times 3.45 \\ \\ = 94.875 \\ \\ \approx 94.88 \: cubic \: units[/tex]
Kwans beginning account balance was $20. his ending balance is $0. what integer represents the change in his account balance from beginning to end?
To rent a certain meeting room, a college charges a reservation fee of $18 and an additional fee $5 of per hour. The chemistry club wants to spend at most %58 on renting the room. What are the possible numbers of hours the chemistry club could rent the meeting room? Use t for the number of hours. Write your answer as an inequality solved for t.
Answer:
You need the minimum cost for renting the meeting room given the following info
Reservation Fee = $18
Hourly Rate = $5
The renter wants to keep the cost below $58
So the cost will vary with the time, t you use the inequality below
5t + 18 ≤ 58
You can solve this to get that minimum
You can check you answer by graphing it.
I hope this helps!<3
Plz help me
The points (6, 10) and (5, 7) fall on a particular line. What is its equation in slope-intercept form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.
NO LINKS
Answer:
Finding the equation using the two points is: y=3x-8
The slope is: m=3
The slope and y-intercept is: 3, (0,-8)
Step-by-step explanation:
I put all of these answers because i was basically fully confused by the wording of this question.. Sorry.
you have a ramp that is 2.5 meters long. its height is 30 centimeters. what is the angle of your ramp?
To determine the angle of the ramp, we can use trigonometry and calculate the inverse tangent (arctan) of the ratio of the height to the length of the ramp.
Given a ramp length of 2.5 meters and a height of 30 centimeters (0.3 meters), the angle of the ramp is approximately 6.87 degrees. The angle of the ramp can be found using the formula: angle = arctan(height/length). By substituting the values, we get angle = arctan(0.3/2.5).
Using a calculator or math software to evaluate the arctan of this ratio, we find that the angle is approximately 6.87 degrees. This means that the ramp has a relatively gentle incline, indicating a low slope or gradient. Knowing the angle of the ramp can be useful in various applications, such as construction, accessibility planning, or determining the safety of the slope for specific purposes.
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A school administrator believes that the mean class GPAs for a given course are higher than the preferred mean of 2.75 at a significance level of 0.05, and checks a randomly chosen sample of 50 classes. Use Sheet 3 of the Excel file to create a histogram, and calculate x¯, the t-statistic, and the p-value.
From the histogram, can normality be assumed?
x¯=
t=
p=
Since the p-value is
evidence exists that the mean GPA is greater than 2.75.
than the significance level 0.05, the null hypothesis
.
Pick Yes No
Pick greater less
Pick fails to be rejected is rejected
3.09
2.73
2.58
2.68
2.84
2.68
2.64
2.62
2.35
2.72
2.63
2.77
2.72
3.03
2.71
2.96
2.74
3.01
2.88
2.68
2.83
3.02
2.83
2.71
2.67
2.79
2.65
2.56
2.78
2.89
2.40
2.38
2.41
2.83
2.86
3.01
2.80
2.84
2.95
2.75
2.93
2.48
2.34
2.97
2.85
2.74
2.84
3.10
2.62
2.77
The mean GPA is greater than 2.75.
Here, we have,
A= 4.0, A- = 3.7, B+ = 3.
three, and many others.
Total the first-class factors, and overall the credit hours. Divide the overall satisfactory points by means of the overall credit score hours.
Grade Point Average (GPA):
Grade point average (GPA) is the measure used to summarize your instructional fulfillment at Griffith. After the e-book of final grades every trimester, your software and career.
GPA is calculated and could be utilized by the college to tell choices, which include the subsequent: educational progression.
Divide the total range of grade factors earned with the aid of the total number of letter-graded units undertaken.
Mean GPA = total / 50
= 2.75.
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One boss decided to increase the salary of an employee by 5%. How much will he get if his salary was $2000?
Answer:
$2100 will be his new salary
Step-by-step explanation:
Well since a 5 percent raise is basically 105% of his pay, we can multiply 105% with 2000
since its a percent in decimal form its 1.05
1.05*2000=2100
$2100 is his new salary
What is the equation of the line that passes through the point (-6, -8) and has a slope of 1/3
Answer:
x^2 = (28)^2 + (45)^2
= 784 + 2025
= 2809
x = 53
The equation of the line is y = (1/3)x - 6.
What is an equation of a line?The equation of a line is given by:
y = mx + c
where m is the slope of the line and c is the y-intercept.
Example:
The slope of the line y = 2x + 3 is 2.
The slope of a line that passes through (1, 2) and (2, 3) is 1.
We have,
The equation of a line is y = mx + c.
Now,
m = 1/3
And,
(-6, -8) = (x, y)
So,
y = mx + c
-8 = 1/3 x -6 + c
-8 = -2 + c
-8 + 2 = c
c = -6
Now,
y = mx + c
y = (1/3)x - 6
Thus,
The equation of the line is y = (1/3)x - 6.
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"
Suppose X is normally distributed with a mean of u = 11.5 and a standard deviation of o = 2. Find the probability of X > 15.14. Show your work.
"
The probability of X > 15.14 is approximately 0.0344 or 3.44%.
To find the probability of X > 15.14, we need to calculate the area under the normal distribution curve to the right of 15.14.
First, we need to standardize the value 15.14 using the formula:
Z = (X - [tex]\mu[/tex]) / o
where Z is the standardized value, X is the given value, [tex]\mu[/tex] is the mean, and o is the standard deviation.
In this case:
Z = (15.14 - 11.5) / 2
= 3.64 / 2
= 1.82
Next, we need to find the area under the standard normal distribution curve to the right of Z = 1.82. This can be done using a standard normal distribution table or a calculator.
Using a standard normal distribution table, we find that the area to the right of Z = 1.82 is approximately 0.0344.
Therefore, the probability of X > 15.14 is approximately 0.0344 or 3.44%.
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Pls help and thank youuuuu:)
Answer:
22
Step-by-step explanation:
according to your question
Solve the equation -3x^2+2x+4= -x-3 by writing a linear-quadratic system and solving using the intersection feature of a graphing calculator. Round to the nearest hundredth
A. x= -2.44 and x=3.12
B. x=-1.63 and x=4.44
C. x=-1.11 and x=2.11
D. x=-2.61 and x=0.42
The solution to the equation -3x^2 + 2x + 4 = -x - 3 is x = -2.44 and x = 3.12. Therefore, the correct option is A.
To solve the equation -3x^2 + 2x + 4 = -x - 3, we can rewrite it as a quadratic equation by combining like terms: -3x^2 + 3x + 7 = 0. This equation represents a quadratic function in the form of ax^2 + bx + c = 0, where a = -3, b = 3, and c = 7.
Using a graphing calculator, we can plot the function and find the x-intercepts, which represent the solutions to the equation. The intersection feature of the graphing calculator can help determine the coordinates of the points where the graph intersects the x-axis. Rounding to the nearest hundredth, we find that the solutions to the equation are x = -2.44 and x = 3.12.
Therefore, the correct answer is option A: x = -2.44 and x = 3.12.
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The owner of a tree farm plants pine trees and oak trees in a ratio of 8:3. How many oak trees are planted if 264 pine trees are planted
Answer:
99 oak trees
Step-by-step explanation:
Given data
Ratio= 8:3
Number of pine tree= 264
Let the number of oak trees be x
Let us apply the part to part method
8/264= 3/x
cross multiply
264*3= 8x
792=8x
x= 792/8
x=99 oak trees
The owner of the tree farm planted 99 oak trees.
An equation is an expression used to show the relationship between two or more numbers or variables.
Given that a farmer plants pine trees and oak trees in a ratio of 8:3. If 264 pine trees are planted, let y represent the total number of trees hence:
264 = (8/11) * y
y = 363 trees
Number of oak trees = (3/11) * 363 = 99 trees
Therefore the owner of the tree farm planted 99 oak trees.
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I need to find the diameter of a circle and the line in the middle is 3/5 cms
Answer:
1.2
Step-by-step explanation:
There are 2 lines in the middle of the circle. Im guessing by you saying "The line in the middle" You must mean the radius your trying to find the diameter so, the radius is half of the diameter so to find the diameter you do the radius x 2 in this case 3/5x2 equals 1.2 :)
I Hope this helps!!
question 1 (2 points) triangle abc is similar to triangle wyz. select all angles whose cosine equals . question 1 options: angle b angle z angle y angle c angle a angle w
In triangle ABC, which is similar to triangle WYZ, the angles whose cosine equals are angle B and angle Z.
To determine the angles whose cosine equals, we need to consider the corresponding angles in similar triangles. In similar triangles, corresponding angles have the same measure, but the side lengths may be different. Since triangle ABC is similar to triangle WYZ, angle B in triangle ABC corresponds to angle Z in triangle WYZ. Similarly, angle Z in triangle ABC corresponds to angle B in triangle WYZ. Therefore, angle B and angle Z are the angles in the respective triangles whose cosine equals.
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Please answer <33 I would lava it :)
Answer:
5 gallons
Step-by-step explanation:
3/4 + 6/8 + 20/8 + 1
6/8 + 6/8 + 20/8 + 8/8
40/8 = 5 gallons
A pencil holder in the shape of a cylinder has the dimensions shown in the diagram 20. Which of the following is the closest to the volume of the cylinder, in cubio H 907 cm F 209 cm G 3,627 cm 4,773 cm
Answer:
my best guess would be H
Step-by-step explanation:
I hope this helped and if you have more details that could help me get to a more appropriate answer pls comment them and I'll do my best to help but like I said with what you provided my best guess would be H
Need your help answer correctly for 20 points! <3
12.50 dollars per hour
Answer:
$12.50
Step-by-step explanation:
Hi,
Cassie: 250 / 20 = 12.5
Marli: 312.50 / 25 = 12.5
Brad: 350 / 28 = 12.5
Each worker makes $12.50 per hour.
I hope this helps :)
Show that the polynomial p(x) = x² +1 € Z3 [x] is irreducible. Let a be a zero of this polynomial and consider the extension Z3(a) = {0, 1, 2, a, 1+a, 2+a, 2a, 1+ 2a, 2 + 2a} = Z3 [x]/(p(x)) Write out the addition and multiplication tables for this field. What is the multiplicative inverse of 2a + 2?
The multiplicative inverse of 2a + 2 is 2a + 1.
To show that the polynomial p(x) = x² + 1 ∈ Z3[x] is irreducible, we can examine its factors. Since Z3 is a field with three elements {0, 1, 2}, we can substitute each value into p(x) to check for roots. However, none of the elements satisfy p(x) = 0. Therefore, p(x) has no linear factors.
Next, we consider the extension Z3(a) = {0, 1, 2, a, 1+a, 2+a, 2a, 1+2a, 2+2a} = Z3[x]/(p(x)), where a is a zero of p(x). In this field, we can perform addition and multiplication modulo 3.
Addition table:
+ | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
-----------------------------------------------------
0 | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
1 | 1 2 a 1+a 2+a 2a 1+2a 2+2a 0
2 | 2 a 1+a 2+a 2a 1+2a 2+2a 0 1
a | a 1+a 2+a 2a 1+2a 2+2a 0 1 2
1+a | 1+a 2+a 2a 1+2a 2+2a 0 1 2 a
2+a | 2+a 2a 1+2a 2+2a 0 1 2 a 1+a
2a | 2a 1+2a 2+2a 0 1 2 a 1+a 2+a
1+2a | 1+2a 2+2a 0 1 2 a 1+a 2+a 2a
2+2a | 2+2a 0 1 2 a 1+a 2+a 2a 1+2a
Multiplication table:
* | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
-----------------------------------------------------
0 | 0 0 0 0 0 0 0 0 0
1 | 0 1 2 a 1+a 2+a 2a 1+2a 2+2a
2 | 0 2 1 2a 1+2a 2+2a a 2+a 1+a
a | 0 a 2a 1+2a 2+a 1+a 2+2a 2 1
1+a | 0 1+a 1+2a 2+a 2 a 1 2+2a 2a
2+a | 0 2+a 2+2a 1+a a 2 1+2a 1 2a
2a | 0 2a a 2+2a 1 1+2a 2 2+a 1+a
1+2a | 0 1+2a 2+a 2 2+2a 1 2a a 1+a
2+2a | 0 2+2a 1+a 1 2a 2 1+a 1+2a a
To find the multiplicative inverse of 2a + 2, we search for an element in the multiplication table that, when multiplied by 2a + 2, results in 1. In this case, the multiplicative inverse is 2a + 1.
Note: The addition and multiplication tables are constructed by performing arithmetic modulo 3 in the field Z3(a) using the given elements.
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jada walks at a speed of 3mph. elena walks at a speed of 2.8 mph. if they both begin walkign along a walking trail at the same time, how much father will jada walk adter 3 hours
Given, Jada walks at a speed of 3 mph and Elena walks at a speed of 2.8 mph.Both Jada and Elena start walking along a walking trail at the same time.
Let us determine the distance covered by both of them.Distance travelled by Jada in 3 hours is:Distance = Speed × Time= 3 mph × 3 hours= 9 miles Distance travelled by Elena in 3 hours is:Distance = Speed × Time= 2.8 mph × 3 hours= 8.4 miles Thus, Jada will walk 0.6 miles farther than Elena after 3 hours.
To determine how far Jada will walk after 3 hours, we need to calculate the distance traveled based on her speed.
Jada walks at a speed of 3 miles per hour (mph), so we can calculate her distance using the formula:
Distance = Speed × Time
Plugging in the values, we have:
Distance = 3 mph × 3 hours
Distance = 9 miles
Therefore, Jada will walk a distance of 9 miles after 3 hours.
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The given information is as follows:
Jada walks at a speed of 3 mph and Elena walks at a speed of 2.8 mph. If they both begin walking along a walking trail at the same time.
Therefore, Jada will walk 9 miles after 3 hours.
The distance covered by Jada after 3 hours can be calculated as follows:
Distance = Speed x Time
Since Jada walks at a speed of 3 mph, the distance covered by her in 3 hours can be calculated as:
Distance covered by Jada = 3 mph x 3 hours
= 9 miles.
Therefore, Jada will walk 9 miles after 3 hours.
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The following chart shows a store?s records of sales of stuffed toys for two months. 2 circle graphs. A circle graph titled September. Teddy bears is 346, rabbits is 297, cats is 199, horses is 245, other is 225. A circle graph titled October. Teddy bears is 308, rabbits is 260, cats is 285, horses is 186, 275 is other. Which of the following are accurate assessments of trends displayed in this graph? I. Sales of teddy bears decreased by about 2.9% between September and October. II. The change in sales of rabbits is roughly equal to the change in sales of all toys. III. Roughly 24.1% fewer horses were sold in October than in September. a. I and II b. II only c. I and III d. III only
Answer:
d
Step-by-step explanation:
..........
Answer:
d
Step-by-step explanation:
e d g e
Find the distance between the two points rounding to the nearest tenth (if necessary). (-1,8) and (8,5)
Please help me with the questions Please please please ASAP ASAP please ASAP help please please ASAP please please help ASAP ASAP please please help please please ASAP please please help ASAP ASAP please please help please please ASAP please
Answer:
9
Step-by-step explanation:
8/12=6/x
cross multiply to get 9
Find the x-intercept(s) Round to nearest hundredth if needed y=-2x^2-8x-4
y=-2x^2-8x-4
-2x^2-8x=4
divide by negative 2
x^2+4x=-2
complete the square
(x+2)^2=-2+4
(x+2)^2=2
x+2=±[tex]\sqrt{2}[/tex]
x=-2±[tex]\sqrt{2}[/tex]
nearest hundreths,
x=-0.59
x=-3.41
According to the latest real estate report from a suburban town, the mean number of home purchases during last quarter was 175 homes with a population standard deviation of 6 homes. A real estate agent believes that the recent increase of mortgage interest rates is causing a decline in home purchases. To test this, the real estate agent randomly selects 60 recent home purchases. What is the probability that the mean of this sample of home purchases is between 173 and 174 homes
Answer:
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(173≤X≤174) = 0.0936
Step-by-step explanation:
Step(i):-
Given that the mean of the Population = 175
Given that the standard deviation of the Population = 6
Let 'x⁻' be the mean of the random sample
Given that x₁⁻ = 173
[tex]Z_{1} = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{173-175}{\frac{6}{\sqrt{60} } } =-2.58[/tex]
Given that x₂⁻ = 174
[tex]Z_{2} = \frac{x^{-}-mean }{\frac{S.D}{\sqrt{n} } } = \frac{174-175}{\frac{6}{\sqrt{60} } } = -1.29[/tex]
Step(ii):-
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(X₁≤X≤X₂) = P(Z₁≤Z≤Z₂)
= P(Z≤Z₂) - P(Z≤Z₂) ( both values 'Z' values are negative)
= 0.5 -A(Z₁) - (0.5 -A(Z₂))
= |A(Z₂) -A(Z₁)|
P(173≤X≤174) = | A(2.58)-A(1.29)|
= 0.4951 - 0.4015 (∵ from normal table)
= 0.0936
Final answer:-
The probability that the mean of this sample of home purchases is between 173 and 174 homes
P(173≤X≤174) = 0.0936