Answer:
c
Step-by-step explanation:
price marked at R85 with VAT included
Answer: No image? Incomplete question? FREE POINTS!
Step-by-step explanation:
BRAINLIEST PLEASE!
PLEASE HELP ME ANSWER THIS QUICKLY AND CORRECTLY WITH EXPLANATION! I WILL MARK YOUR BRAINLIST IF ONLY YOUR ANSWER IS CORRECT.
A.) Similar? YES
Why or why not? It is similar because as your can see in the picture above, it shows a large triangle and a small triangle. On the smaller triangle, the corner "G" has a degree of 67. On the larger triangle, the corner "P" has the same degree as the smaller one, therefore all the other corners have the same degree making the missing degree for "R" 34 degrees, and the missing "C" 79 degrees.
If so, *similarity statement and scale factor: SF: 1.5
*I didn't know what they meant by similarity statement
B.) Similar? NO
Why or why not? The triangles are two totally different shapes, with totally different degree angles, making it totally different
If so, *similarity statement and scale factor: SF: 2
*I didn't know what they meant by similarity statement
C.) Similar? NO
Why or why not? The triangles are two totally different shapes, with totally different degree angles, making it totally different
If so, *similarity statement and scale factor: SF: 1.2
*I didn't know what they meant by similarity statement
D.) Similar? YES
Why or why not? They are the same shape; just with one enlarged and one decreased in size. They both have the same angle degree and everything else similar but the size of the shape.
If so, *similarity statement and scale factor: SF: 2
*I didn't know what they meant by similarity statement
**To find the scale factor you would have to divide the big number, to the smaller number... Like for figure D, the base of the BIG triangle is 56, and the small triangle is 28. 56 ÷ 28 = 2 Making 2 the SF (Scale Factor)
Two people are trying to decide whether a die is fair. They roll it 100 times, with the results shown
21 ones, 15 twos, 13 threes, 17 fours, 19 fives, 15 sixes
Average of numbers rolled = 3.43, SD = 1.76 One person wants to make a z-test, the other wants to make a test X^2.
a. True or false: the correct test for this question with these data is the z-test. FALSE No matter what you answer above, carry out the X^2 test.
Expected frequency for each face (number) of the die= _______ (round answer to the nearest 0.1).
c. Number of degrees of freedom: df = ________
d. X^2 = ________
e. P = _________
Two people are trying to decide whether a die is fair. The correct test for analyzing the fairness of the die with the given data is the chi-square [tex]X^2[/tex] test, not the z-test.
The z-test is used for analyzing data when we have known population parameters, such as the mean and standard deviation. However, in this case, we are dealing with categorical data (the frequencies of each face of the die), and we want to determine if the observed frequencies significantly differ from the expected frequencies.
To perform the chi-square test, we first need to calculate the expected frequency for each face of the die. The expected frequency is calculated by multiplying the total number of rolls (100) by the probability of each face (1/6, assuming a fair die). Each face of the die is expected to occur approximately 16.67 times (100/6 = 16.67).
Next, we calculate the degrees of freedom (df) for the chi-square test. For a fair die with 6 faces, the df is (number of categories - 1), which is 5 in this case.
Then, we calculate the chi-square statistic[tex](X^2)[/tex] by summing the squared differences between the observed and expected frequencies, divided by the expected frequencies. The [tex]X^2[/tex] value is used to assess the goodness-of-fit between the observed and expected frequencies.
Finally, we determine the p-value associated with the calculated [tex]X^2[/tex]value using the chi-square distribution and the degrees of freedom. The p-value indicates the likelihood of observing the data if the die is fair.
To provide the specific values for the expected frequency, degrees of freedom, [tex]X^2[/tex], and p-value, the actual calculations based on the given data are required.
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HELP ASAP!!!!!!! BRAINLIEST
5 attached
Answer:
I answered it on the second time you asked this question check it out
Answer quickly pllllllllllsssssss
Write the following answers in the form ' x/y or p%'
Answer
Twenty-five percent of the animals at the farm are cows. There are 78 cows. How many animals live at the farm?
Answer:
312
Step-by-step explanation:
Consider the following system of linear equations 3x X2 + X₂ 1 3x1 + 6x2 + 2x2 = 0 3x1 + 3x2 + 7x, = 4 (a) Find the first three iterations of the Gauss-Seidel method using x(0) = 0 (6)Find the first three iterations of the Jacobi's method using x( ) = 0
Gauss-Seidel Method:
Iteration 1:
Starting with x(0) = [0, 0], we can substitute the initial values into the system of equations:
3(0) + 1(0) + 3x₂(1) + 6x₂(0) + 2x₂(0) = 0 -> 3x₂ = 0
3(0) + 3x₂(1) + 7x₂(0) = 4 -> 3x₂ = 4
Solving these equations, we find x(1) = [0, 4/3].
Iteration 2:
Using the updated values from the previous iteration, we have:
3x₁(1) + x₂(0) + 3x₂(1) + 6x₂(4/3) + 2x₂(4/3) = 0 -> 3x₁ + 16x₂ = -16/3
3x₁(1) + 3x₂(1) + 7x₂(4/3) = 4 -> 3x₁ + 19x₂ = 16/3
Solving these equations simultaneously, we obtain x(2) ≈ [-16/15, 8/15].
Iteration 3:
Using the updated values from the previous iteration:
3x₁(-16/15) + x₂(8/15) + 3x₂(-16/15) + 6x₂(8/15) + 2x₂(8/15) = 0 -> 3x₁ + 32x₂ = -16/5
3x₁(-16/15) + 3x₂(8/15) + 7x₂(8/15) = 4 -> 3x₁ + 19x₂ = 16/3
Solving these equations, we find x(3) ≈ [-16/35, 16/35].
After three iterations of the Gauss-Seidel method using the given initial value x(0) = [0, 0], we obtain an approximate solution of x(3) ≈ [-16/35, 16/35].
Jacobi's Method:
Iteration 1:
Starting with x(0) = [0, 0], we can update each component separately:
x₁(1) = (0 - (1(0) + 3x₂(0)) / 3 -> x₁ = 0
x₂(1) = (4 - (3x₁(0) + 7x₂(0))) / 3 -> x₂ = 4/3
Hence, x(1) = [0, 4/3].
Iteration 2:
Using the updated values from the previous iteration:
x₁(2) = (0 - (1(0) + 3x₂(4/3)) / 3 -> x₁ ≈ -16/15
x₂(2) = (4 - (3x₁(0) + 7x₂(4/3))) / 3 -> x₂ ≈ 8/15
Therefore, x(2) ≈ [-16/15, 8/15].
Iteration 3:
Using the updated values from the previous iteration:
x₁(3) = (0 - (1(-16/15) + 3x₂(8/15)) / 3 -> x₁ ≈ -16/35
x
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please help this is myhrw.com hw
Answer:
No a triangle CAN’T have 2 obtuse angles. I dont know about the drop down menus since I can’t see the choices but there can’t be 2 obtuse angles in a triangle. I can guess two of them anyway
The second drop down one is “greater”
The last option is 180
Im not sure about he first since dropdowns aren’t presented
A sample of 16 values is taken from a normal distribution with mean µ. The sample mean is 13.25 and true variance 2 is 0.81. Calculate a 99% confidence interval for µ and explain the interpretation of the interval.
we are 99% confident that the true value of µ lies within the interval (12.5831, 13.9169).
We have a random sample from a normal distribution with mean µ and a true variance of 0.81.
From this sample of 16 values, the sample mean was 13.25.
We want to calculate the 99% confidence interval for µ.
We can use the t-distribution to calculate the confidence interval since the sample size is less than 30.
We need to find the t-value that corresponds to a 99% confidence interval and 15 degrees of freedom (n-1).
We can use a t-distribution table or calculator to find that the t-value is 2.9477.
Using this value, we can calculate the confidence interval as follows: Lower bound = sample mean - (t-value * standard error)Upper bound = sample mean + (t-value * standard error) The standard error is the standard deviation divided by the square root of the sample size.
So, in this case: Standard error = √(0.81/16) = 0.2025 Lower bound = 13.25 - (2.9477 * 0.2025) = 12.5831Upper bound = 13.25 + (2.9477 * 0.2025) = 13.9169Therefore, the 99% confidence interval for µ is (12.5831, 13.9169).
This means that if we repeated the process of taking a sample of 16 values many times and calculating a confidence interval each time, we would expect that 99% of those intervals would contain the true value of µ.
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Given: Sample size, n = 16, Sample mean, x = 13.25, Population variance, σ² = 0.81, Confidence level = 99%. The 99% confidence interval for the population mean, µ, is (12.676, 13.824). It means that if we repeat the process of drawing samples of size 16 from the same population infinite times and calculate the confidence intervals, then 99% of those confidence intervals will contain the true population mean.
Since the sample size is greater than 30 and we have a known population variance, we can use the z-distribution for finding the confidence interval for the population mean.
We can use the following formula to find the confidence interval at a given confidence level.
x - z(α/2) * σ/√n < µ < x + z(α/2) * σ/√n, Where z(α/2) is the z-value at α/2 level of significance.
z(α/2) can be found from the standard normal distribution table.
At 99% confidence level,
α = 1 - 0.99
= 0.01.
α/2 = 0.01/2
= 0.005.
At α/2 = 0.005 level of significance,
z(α/2) = 2.576
σ = √0.81
= 0.9
Substituting the values in the formula,
x - z(α/2) * σ/√n < µ < x + z(α/2) * σ/√n
13.25 - 2.576 * 0.9/√16 < µ < 13.25 + 2.576 * 0.9/√16
13.25 - 0.574 < µ < 13.25 + 0.57412.676 < µ < 13.824
Interpretation of Interval: The 99% confidence interval for the population mean, µ, is (12.676, 13.824).
It means that if we repeat the process of drawing samples of size 16 from the same population infinite times and calculate the confidence intervals, then 99% of those confidence intervals will contain the true population mean.
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Solve the given differential equation by undetermined coefficients.
y"-10y'+25y = 30x +3
The given differential equation by undetermined coefficients is y'' - 10y' + 25y = 30x + 3. Its solution is as follows: Let us assume y = yh + yp where yh is the homogeneous solution and yp is the particular solution. To find the homogeneous solution, solve the following differential equation: y'' - 10y' + 25y = 0characteristic equation: r2 - 10r + 25 = 0(r - 5)2 = 0Thus, yh = c1e5x + c2xe5x
Now, let us find the particular solution by assuming the following particular solution: yp = Ax + B Substituting this into the differential equation: y'' - 10y' + 25y = 30x + 3 yields:-10A + 25B = 3, and0x + A = 30Solving for A and B: A = 30 and B = 15Thus, yp = 30x + 15Therefore, the general solution is:y = yh + yp = c1e5x + c2xe5x + 30x + 15, where c1 and c2 are arbitrary constants.
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Find the area of this figure
Answer:
45cm
Step-by-step explanation:
3 x 5 x 3 x 1/2
(if im wrong im sorry)
Evaluate the expression 3x (x+4), for x=5 show and explain your steps
Answer:
27
Step-by-step explanation:
3 x ((5) + 4)
3 x 9 =27
Calculate the following operations on numbers: a) 4x2 + 3 + 6 - 2 + 7 X 2 b) 4+2-6-1 - 7+ 12 c) -48 - 12) = (-3 +11) d) (-5)(6)(-9)
a) the value of the expression is 29.
b) the value of the expression is -3.
d) the value of the expression is 270.
a) To calculate the expression 4x2 + 3 + 6 - 2 + 7 X 2, follow the order of operations (PEMDAS/BODMAS):
4x2 = 8
7 X 2 = 14
Now we can substitute these values into the expression:
8 + 3 + 6 - 2 + 14
Performing the addition and subtraction from left to right:
= 11 + 6 - 2 + 14
= 17 - 2 + 14
= 15 + 14
= 29
Therefore, the value of the expression is 29.
b) To calculate the expression 4+2-6-1 - 7+ 12, again use the order of operations:
4 + 2 = 6
-7 + 12 = 5
Now we can substitute these values into the expression:
6 - 6 - 1 - 7 + 5
Performing the subtraction and addition from left to right:
= 0 - 1 - 7 + 5
= -1 - 7 + 5
= -8 + 5
= -3
Therefore, the value of the expression is -3.
c) To calculate the expression (-48 - 12) = (-3 + 11), perform the subtraction and addition:
-48 - 12 = -60
-3 + 11 = 8
Now we can substitute these values into the equation:
-60 = 8
The equation is not true since -60 is not equal to 8. Therefore, there is no solution to this equation.
d) To calculate the expression (-5)(6)(-9), perform the multiplication:
(-5)(6)(-9) = -30(-9)
= 270
Therefore, the value of the expression is 270.
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Cosine of 60 degrees
Answer:
1/2
Step-by-step explanation:
Its value is 1/2.Hope it helps :)
Solve the system using elimination: 3x + 4y = 31 and 2x - 4y = -6
Please help. Thank you.
Answer:
x =5, y = 4
Step-by-step explanation:
3x + 4y = 31..... (1)
2x - 4y = -6..... (2)
Adding equations (1) & (2)
[tex]3x + \cancel{4y} = 31 \\2x - \cancel{4y} = -6\\ - - - - - - - \\ 5x = 25 \\ x = \frac{25}{5} \\ \bold{ \purple{x = 5}} \\ plug \: x = 5 \: in \: eq \: (1) \\ 3(5) + 4y = 31 \\ 15 + 4y = 31 \\ 4y = 31 - 15 \\ 4y = 16 \\ y = \frac{16}{4} \\ \bold{ \red{y = 4}}[/tex]
andre says he can use the long division to divide 17 by 20 to get the decimal
Answer:
0.85
Step-by-step explanation:
What is the product of 630 and 7.2 x 104 expressed in scientific notation?
PLEASE HELP!!! I WILL MARK!
Answer:
D. the average difference in height between each player and the mean height
How do you find the product of 3x^2y^5 and 4x^3y^7
Answer:
S
=
{
(
−
2
,
5
)
}
Step-by-step explanation:
help me plz and thank you
Answer:
6
10
Step-by-step explanation:
30 5 6
70 7 10
Please answer correctly! I will mark you as Brainleist!
Answer:
c.32/3π units ³
Step-by-step explanation:
V= 4/3πr³
r=4/2=2units
V= 4/3π(2)³
V= 4/3π *8
V= 32/3π units ³
Answer:
V≈32/3
Step-by-step explanation:
V=4 /3πr3=4 /3·π·23≈33.51032
33.5/3.14=10.6
32/3=10.6
Please brainliest! I worked so hard!
if a is a 7×9 matrix, what is the smallest possible dimension of nul A?
a. 2
b. 7
c. 0
d. 9
If a is a 7×9 matrix, the smallest possible dimension of nul A is 2. The correct option is a.
The smallest possible dimension of the null space (also known as the kernel) of matrix A depends on the rank of the matrix.
The rank of a matrix represents the maximum number of linearly independent rows or columns it contains.
In this case, we have a 7×9 matrix.
According to the rank-nullity theorem,
the dimension of the null space is given by the difference between the number of columns and the rank of the matrix.
The smallest possible dimension of the null space would be:
Dimension of null space = Number of columns - Rank of matrix
Since the matrix A has 9 columns, the smallest possible dimension of the null space would be:
Dimension of null space = 9 - Rank of matrix
The rank of the matrix can vary. It can range from 0 (if the matrix is a zero matrix) to a maximum of 7 (if all rows are linearly independent). So, depending on the rank, the smallest possible dimension of the null space can be any value between 9 and 2.
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What is the best estimate for this sum?
1/3+4/7
Answer:
19/21
Step-by-step explanation:
1×7+4×3/21
19/21
what is 3x-11 ≥ 7x + 9
Answer:
The answer is x is greater than or equal to -2
Step-by-step explanation:
I just did the math by hand
Answer: x ≤ -5
Step-by-step explanation:
3x - 11 ≥ 7x + 9
3x ≥ 7x + 20
-4x ≥ 20 when dividing negative numbers, change the sign to the opposite.
x ≤ -5
help ASAP ill mark brainliest
Answer:
16.1, 16, 16
Step-by-step explanation:
1) we are going to do the mean :)
you add all the number together and divide by the same number
you should get 354/22 which is 16.0909....... since its round to tenth place, we place it at 16.1.
2) median, for this one, you have to lay out the numbers and see which one is in the middle, in 14,15,16,17,19, 16 is the median.
3) the number that appear the most is the mode, so right now we have
three 17s and six 16s, don't worry about the others because its not in the answer choice, so its 16.
Hope this helps :D
Please please help please please ASAP I willl kisssss your azzz if you help me please please help please please ASAP please please help please
Answer: 3x-x+2=4
Step-by-step explanation:
12/X=3/6 CROSS MULTIPLY.
3X=12*6
3X=72 X=72/3 X= 24 FEET TALL.
Solve the inequality below and identify the correct answer: X - 2<-4
Explanation: Its really similar to solving an equation, so all I did was add 2 to both sides :)
Which pairs of polygons are congruent? A. pairs 1, 2, 3, and 4 B. pairs 1 and 4 C. pairs 1, 2, and 3 D. pairs 2 and 4
The lateral surface area of a triangular prism is 182 in. The height is 14 in. What is the perimeter of the prism?
Answer:
13 in
Step-by-step explanation:
Let s be the length of a side of the triangle
then one rectangular face of the triangular prism
would be s x 14.
There are 3 rectangular faces in the triangular prism so
Lateral Surface Area = 3 x (s x 14)
182 = 42s
182/42 = s
There are 3 sides to the triangle so
3 x (182/42) = 13