The set in problem 8 was not a subspace because one of the subspace axioms requires that the zero vector, which is the additive identity element, is included in the set. In the given problem, the zero vector was not part of the set, so it failed to satisfy this axiom
a. The set F is a subset of the vector space of continuous functions on some interval, which we have studied this semester.
b. To prove whether F is a subspace of the vector space of continuous functions, we need to check if F satisfies the three subspace axioms: closure under addition, closure under scalar multiplication, and the zero vector property.
Let f and g be two functions in F, and let c be a scalar. To show closure under addition, we need to prove that f + g is also in F. Since both f and g have the property that f'(2) = 0 and g'(2) = 0, their sum (f + g) will also have the property that (f + g)'(2) = f'(2) + g'(2) = 0 + 0 = 0. Therefore, f + g is in F.
To show closure under scalar multiplication, we need to prove that cf is also in F. Again, since f has the property that f'(2) = 0, multiplying f by any scalar c will not change the derivative at 2. Therefore, (cf)'(2) = c × f'(2) = c × 0 = 0, and cf is in F.
Finally, the zero vector property states that the zero function, denoted as 0, must be in F. The zero function has the property that its derivative is always zero, including at 2. Therefore, 0'(2) = 0, and the zero function is in F.
Since F satisfies all three subspace axioms, we can conclude that F is a subspace of the vector space of continuous functions.
c. We can get away with not checking the other eight axioms (associativity, commutativity, distributivity, etc.) because F is a subset of a known vector space. By being a subset of a vector space, F inherits those axioms from the larger vector space. The other eight axioms are properties of vector spaces that hold true for all vectors in the larger vector space, including the vectors in F. Therefore, if F satisfies the subspace axioms, it automatically satisfies the other eight axioms by virtue of being a subset of a vector space.
d. It was not okay to only check the two subspace axioms on problem 8 from exam 2 because the set in that problem did not satisfy the zero vector property. One of the subspace axioms requires that the zero vector, which is the additive identity element, is included in the set. In the given problem, the zero vector was not part of the set, so it failed to satisfy this axiom. As a result, the set in problem 8 was not a subspace.
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1. (i) On a sheet of graph paper, using a scale of
1 cm to represent 1 unit on the x-axis and
1 cm to represent 1 unit on the y-axis, draw
the graph of each of the following functions
for values of x from 0 to 4.
(a) y=2x+8
(b) y=2x+2
(c) y=2x-3
(d) y=2x-6
(ii) What do you notice about the lines you have
drawn in part (i)?
i)
The graph is attached as an image.
ii.) We notice that all the lines have the same slope of 2 which shows a consistent rate of change
What is a graph?A graph is described as as the pictorial representation of that represents any given data in a chronological manner that is ascending to descending type.
1. y =2x+8
x = 1
Y = 2(1)+8
Y= 2+8
Y = 10
2. y =2x + 2
x=2
Y= 2(2) +2
=4+2
Y=6
3. y= 2x – 3
x = 3
Y = 2(3) -3
Y= 6-3
Y=3
4. y = 2x -6
x=4
Y = 2(4) -6
Y= 8-6
Y=2
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f(1) = 1
f(2) = 2
f(n) = f(n − 2) + f(n − 1)
f(3)
Answer:
f(3) = 3
Step-by-step explanation:
f(1) = 1
f(2) = 2
f(n) = f(n − 2) + f(n − 1)
f(3) = f(3 - 2) + f(3 - 1)
= f(1) + f(2) = 1 + 2 = 3
Special Note: Have you heard of the Fibonacci sequence?
The formula f(n) = f(n − 2) + f(n − 1) is used to find the terms of the of the Fibonacci sequence
what is the:
axis of symmetry?
vertex?
Domain?
range?
x-intercepts?
y-intercept?
maximum or minimum?
Answer:
axis of symm: x = -1
vertex: (-1, -4)
domain: all real numbers
range: y ≥ -4
x-intercepts: 1, 3
y-intercept: -3
minimum at (-1, -4)
Step-by-step explanation:
what is the value of 8 3/5 + (-4 2/5) - 11 1/5
Answer:
Its right infront of you.....
1/5
Step-by-step explanation:
Outline a proof of the following statement by writing the "starting point" and the "conclusion to be shown" in a proof of the statement. real numbers r and s, if r and s are rational then r-sis ration
We can conclude that r - s is rational.
Proof: Suppose r and s are rational numbers.
We must show that r - s is rational.
To prove this, we will use the closure property of rational numbers under subtraction.
Starting point: Suppose r and s are rational numbers.
Conclusion to be shown: We must show that r - s is rational.
By definition, a rational number can be expressed as a fraction p/q, where p and q are integers and q is not equal to zero.
Let r = a/b and s = c/d, where a, b, c, and d are integers and b, d are not equal to zero.
Now, we can express r - s as (a/b) - (c/d).
By the closure property of rational numbers under subtraction, the difference of two rational numbers is also a rational number.
Therefore, we can conclude that r - s is rational.
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Given question is incomplete, the complete question is below
Outline a proof of the following statement by writing the "starting point" and the "conclusion to be shown" in a proof of the statement.
∀ real numbers r and s, if r and s are rational then r−s is rational.
That is, complete the sentences below.
Proof: Suppose ___________.
We must show that ______________.
A bag of marbles contains 4 green, 3 blue, 2 red, and 5 yellow marbles. How many total possible outcomes are when choosing a marble from the bag?
Answer:
14
Step-by-step explanation:
Answer:
14
Step-by-step explanation:
4+3+2+5=14
either solve the given boundary value problem or else show that
it has no solution
y'' + 4y = 0, y(0)=0, y(L)=0
The given boundary value problem, y'' + 4y = 0, with boundary conditions y(0) = 0 and y(L) = 0, has a unique solution. Therefore, the solution to the given boundary value problem is y(x) = c2 sin(2x), where c2 is a constant and L = nπ/2.
To solve the given boundary value problem, we start by finding the general solution to the homogeneous differential equation y'' + 4y = 0. The characteristic equation associated with this differential equation is r^2 + 4 = 0, which has complex roots: r1 = 2i and r2 = -2i.
The general solution to the homogeneous equation is y(x) = c1 cos(2x) + c2 sin(2x), where c1 and c2 are constants. Now, we apply the boundary conditions to determine the specific solution.
Using the first boundary condition y(0) = 0, we have 0 = c1 cos(0) + c2 sin(0), which simplifies to c1 = 0. Therefore, the solution becomes y(x) = c2 sin(2x).
Now, we use the second boundary condition y(L) = 0. Substituting L for x in the solution, we get 0 = c2 sin(2L). For this equation to hold for all L, sin(2L) must be equal to zero, which means 2L = nπ, where n is an integer. Solving for L, we have L = nπ/2.
Therefore, the solution to the given boundary value problem is y(x) = c2 sin(2x), where c2 is a constant and L = nπ/2. Since both boundary conditions are satisfied for y(x) = 0, we conclude that the only solution to the problem is y(x) = 0.
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HELP UHM, true or false question, look at the image, dont guess and no links + brainiest + extra points
Answer:
false
it can have more
Answer:
Yes
What solid shape do the two nets make?
1. Rectangular Prism
2. Triangular Prism
Brainlist Pls!
IF YOU TELL ME HOW YOU GOT THE ANSWER FIRST YOU WILL GET A CROWN
Answer:
C
Step-by-step explanation:
basically see where each dot is and the number its beside and the number its above answer for example the first one is in between 20 and 30 so its 25 and its above 1 so it would 1, 25 u just do that for all the dots :)
Find the volume of a cone with a base radius of 5 in. and a height of 12 in.
Answer:
V = 314
Step-by-step explanation:
Volume of a cone:
V = πr²(h/3)
Given:
r = 5
h = 12
Work:
V = πr²(h/3)
V = 3.14(5²)(12/3)
V = 3.14(25)(4)
V = 314
Answer:
The volume of the cone is 311.1in³.
Step-by-step explanation:
V = ⅓Bh where B = πr²
V = ⅓πr²h
V = ⅓(22/7)(5²)12
V = 0.33(3.142)(25)12
V = 311.1in³
HELP PLEASE 10 POINTS
Answer:
Angle K is 55 degrees
Step-by-step explanation:
Angle K corresponds to Angle R
One day 20% of the children were away from school on a visit to the museum. If there were369 children altogether, —————— children were in school and —————were on museum trip
Answer: See explanation
Step-by-step explanation:
Total number of children = 369
Percentage of children on museum trip = 20%
Number of children on museum trip = 20/100 × 369
= 1/5 × 369
= 73.8 = 74 approximately
Number of children in school = 369 - 73.8 = 295.2 = 295 approximately
help ASAP ill mark brainliest, you dont need to explain the answer
Answer:
The first option.
Step-by-step explanation:
Add all the numbers together and voila you get 27
state a,b, and the y-intercept then graph the function on a graphing calculator
Answer:
No x-intercepts
y-intercepts: (0,2)
Step-by-step explanation:
describe the sample space in terms of the condition (functional or defective) of each nozzle after a year. let ""f"" denote a functional nozzle after a year and ""d"" denote a defective one.
The sample space, in terms of the condition (functional or defective) of each nozzle after a year, can be represented using the symbols "f" and "d" to denote a functional and defective nozzle, respectively.
The possible outcomes in the sample space can be described as a combination of these symbols. For example, if we have three nozzles, the sample space could include outcomes such as "fff" (all three nozzles are functional), "dfd" (the first and third nozzles are functional, while the second one is defective), "ffd" (the first two nozzles are functional, while the third one is defective), and so on.
Each outcome in the sample space corresponds to a particular arrangement or configuration of functional and defective nozzles after a year. The sample space encompasses all the possible combinations and provides a comprehensive representation of the different outcomes that can occur.
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Let A be a 3 x 3 matrix. Suppose that the eigenvalues of A are 1 = -1 and 12 = 3. Let V1, V2, V3 be defined below: N V1 V2 = V3 = - 1 3 Further, suppose that: A basis for the eigenspace of A corresponding to 11 = -1 is Bi = {v1}. A basis for the eigenspace of A corresponding to 12 = 3 is B2 = {V2, V3} (a) (2 points). Find the product: Av2. O 0 2 [B (b) (7 points). Find the product: A(3v1 - v3). Show all work. А 3 vi , 13 0 V22 u 3 3 3 O 4 3 (-1)(-4) o 1(-4) -1(3) O 0 O 1 H: 888 HJE] 3] ] 10 PAR88] (c) (3 points). Identify two eigenvectors of A corresponding to li = -1. U al -10 6 1 (d) (8 points). Is A diagonalizable? Answer "Yes" or "No". If you answered "Yes", diagonalize A: that is, find matrices P and D such that P-1AP = D. If you answered "No", explain why. Yes
Given a 3x3 matrix A with eigenvalues -1 and 3, and corresponding eigenvectors V1 = [-1, 3, -1] and V2 = [0, 2, 3], we can determine various products and properties of the matrix A.
(a) To find the product Av2, we simply multiply the matrix A by the vector V2. The resulting product is [0, 2, 10].
(b) To find the product A(3v1 - v3), we first calculate 3v1 - v3, which is equal to [-4, -10, 6]. Then, we multiply the matrix A by this vector to obtain the product [-4, -10, 10].
(c) Two eigenvectors corresponding to the eigenvalue -1 can be identified as V1 = [-1, 3, -1] and any scalar multiple of V1, such as [2, -6, 2].
(d) To determine if A is diagonalizable, we check if it has three linearly independent eigenvectors. In this case, A has two distinct eigenvalues (-1 and 3), and we are given that the eigenspace corresponding to each eigenvalue has a basis with two vectors in total. Since the sum of the dimensions of the eigenspaces is equal to the dimension of A (3), A is diagonalizable.
To diagonalize A, we construct a matrix P with the eigenvectors as its columns. We have P = [V1, V2, V3] = [-1, 0, 2; 3, 2, -6; -1, 3, 2]. Then, we calculate P-1 and find D, the diagonal matrix of eigenvalues: D = diag(-1, 3). Finally, we obtain the diagonalized form P-1AP = D, where P-1 is the inverse of matrix P.
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A 95% confidence interval for the mean body mass index (BMI) of young American women is 26.8 +0.6. One of your classmates interprets this interval in the following way: "The mean BMI of young American women cannot be 28." Is your classmate's interpretation correct? If not, what is the correct interpretation of the confidence interval? Incorrect. We are 95% confident that future samples of young women will have mean BMI between 26.2 and 27.4.
Incorrect. We are 95% confident that the interval from 26.2 and 27.4 captures the BMI of all young American women.
Correct. The interval states that the mean BMI of young American women is between 26.2 and 274, so the mean cannot be 28. Incorrect. We are 95%confident that the interval from 26.2 and 274 captures the true mean BMI of all young American women. Incorrect. If we take many samples, the population mean BMI will be between 26.2 and 27.4 in about 95% of those samples.
Incorrect. We are 95% confident that the interval from 26.2 and 27.4 captures the BMI of all young American women is the correct interpretation of the confidence interval.
A 95% confidence interval is a range of values that we can be 95% sure contains the true mean of the population. The 95% confidence interval for the mean body mass index (BMI) of young American women is 26.8 ± 0.6.
This means that we are 95% confident that the true mean BMI of young American women is between 26.2 and 27.4.
Consequently, the statement, "The mean BMI of young American women cannot be 28" is incorrect as the confidence interval does not include the value 28.
However, this does not imply that the true mean BMI of young American women cannot be 28.
A confidence interval is a statistical range that provides an estimate of the possible values for an unknown population parameter, such as a mean or proportion, based on a sample from that population. It provides a range of values within which the true population parameter is likely to fall, along with a specified level of confidence.
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Fritz is recording the decay of radioactive material. The table displays the
number of weeks and the level of radioactivity he measures each week.
What will be the level of radioactivity in 10 weeks?
Answer:
Every week, the radioactivity decreases by a factor of 5
After 1 week, it goes from 5,000 to 1,000
2 weeks 1,000 / 5 =200
3 weeks 200 / 5 = 40
4 weeks 40 / 5 = 8
5 weeks 8 / 5 = 1.6
6 weeks 1.6 / 5 = 0.064
7 weeks 0.064 / 5 = 0.0128
8 weeks .0128 / 5 = 0.00256
9 weeks 0.00256 / 5 = 0.000512
10 weeks 0.000512 / 5 = 0.0001024
Step-by-step explanation:
Answer:
It is 8/3125
8
3125
Step-by-step explanation:
It is the second option
Please help me with this question please
Answer:
Step-by-step explanation:
Hi
Answer:
15
Step-by-step explanation:
The ratio of (the foot of the ladder to the person) : (the person's height) is equal to (the wall to the foot of the ladder) : (the height of the wall) because the triangles are similar. So, if you solve the problem you will get:
(x= the height of the wall)
6:6 = 6+9:x
6:6 = 15:x
1:1=15:x
x=15
The height of the wall is 15 feet.
use identities to find values of the sine and cosine functions of the function for the angle measure. 2x given tan x = -4 and cos x > 0
cos 2x = ____
sin 2x = _____
Using the identities to find values of the sine and cosine functions of the function the angle measure,
cos 2x = 1
sin 2x = -8√17/17.
Given that tan x = -4, we can determine the values of cos 2x and sin 2x.
Using the identity tan x = sin x / cos x, we have sin x = -4 cos x.
Now, we can use the Pythagorean identity sin² x + cos² x = 1 to solve for cos x:
(-4 cos x)² + cos² x = 1
16 cos² x + cos^2 x = 1
17 cos² x = 1
cos² x = 1/17
cos x = ± √(1/17)
Since we know that cos x > 0, we take cos x = √(1/17).
Next, we can find sin x using sin x = -4 cos x:
sin x = -4 × √(1/17) = -4/√17 = -4√17/17.
Now, we can find cos 2x and sin 2x using the double angle identities:
cos 2x = cos² x - sin² x = (1/17) - (-16/17) = 17/17 = 1
sin 2x = 2 sin x cos x = 2 × (-4√17/17) × √(1/17) = -8√17/17.
Therefore, cos 2x = 1 and sin 2x = -8√17/17.
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3 (x + 1 ) = 33 solve for x
Answer:
x=10
Step-by-step explanation:
x+1=11
Answer:
X-10
Step-by-step explanation:
3(x+1)=33
3x+3=33
3x+3-3=33-3
3x=30
x=10
The one at the bottom
Answer: Decrease it’s a negative
Step-by-step explanation:
Fitting a straight line to a set of data yields the following prediction line. Complete (a) through (c) below. } = 6 + 4x a. Interpret the meaning of the Y-intercept, bo. Choose the correct answer below. A. The Y-intercept, bo = 4, implies that when the value of X is the mean value of Y is 4. B. The Y-intercept, bo = 6, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 6 units C. The Y-intercept, bo = 6, implies that the average value of Y is 6. OD. The Y-intercept, bo = 6, implies that when the value of X is 0, the mean value of Y is 6. b. Interpret the meaning of the slope, by. Choose the correct answer below. A. The slope, by = 4, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 4 units. B. The slope, b4 = 4, implies that the average value of Y is 4. OC. The slope, by = 6, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 6 units. D. The slope, by = 4, implies that for each increase of 1 unit in X, the value of Y is expected to decrease by 4 units. c. Predict the mean value of Y for X = 4. ; = (Simplify your answer.)
(a) The Y-intercept, bo = 6, implies that when the value of X is 0, the mean value of Y is 6.
(b) The slope, by = 4, implies that for each increase of 1 unit in X, the value of Y is expected to increase by 4 units.
(c) The mean value of Y for X = 4 is predicted to be 22.
The Y-intercept, bo, represents the starting point of the prediction line. In this case, when X is 0, the mean value of Y is expected to be 6. This implies that before any increase or decrease in X, the average value of Y starts at 6.
The slope, by = 4, indicates the rate at which Y is expected to change for each unit increase in X. Therefore, for every 1 unit increase in X, the value of Y is expected to increase by 4 units. This implies a linear relationship between X and Y, where the increase or decrease in X directly influences the corresponding change in Y.
To predict the mean value of Y for X = 4, we can use the prediction line equation: Y = 6 + 4x. Substituting X = 4 into the equation, we get: Y = 6 + 4(4) = 6 + 16 = 22. Therefore, the mean value of Y for X = 4 is predicted to be 22.
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You roll a single 6 sided die. What are the odds of rolling a 4?
A. 1/4
B. 4
C. 4/6
D. 1/6
Macy wants to know if the number of words on a page in her grammar book is generally more than the number of words on a page in her math book. She takes a random sample of 25 pages in each book, then calculates the mean, median, and mean absolute deviation for the 25 samples of each book. MeanMedianMean Absolute DeviationGrammar49.7418.4Math34.5441.9 She claims that because the mean number of words on each page in the grammar book is greater than the mean number of words on each page in the math book, the grammar book has more words per page. Based on the data, is this a valid inference? (1 point) a No, because there is a lot of variability in the grammar book data. b Yes, because there is a lot of variability in the grammar book data. c Yes, because the mean is larger in the grammar book. d No, because the mean is larger in the grammar book.
The higher Variability in the math book data, it is not a valid inference to conclude that the grammar book has more words per page solely based on the mean comparison.
Based on the given information, the valid inference would be:
d) No, because the mean is larger in the grammar book.
The mean number of words per page in the grammar book is 49.7, while the mean number of words per page in the math book is 34.5. Since the mean in the grammar book is larger, Macy's claim seems valid at first glance. However, it is important to consider other factors such as the variability in the data.
The mean absolute deviation (MAD) provides a measure of the variability or spread of the data. In this case, the MAD for the grammar book is 18.4, while the MAD for the math book is 41.9. The fact that the MAD for the math book is significantly higher indicates that there is more variability in the number of words on each page in the math book.
This high variability in the math book data suggests that there could be pages with a significantly higher number of words, even though the mean is lower. On the other hand, the lower MAD for the grammar book suggests that the number of words per page in the grammar book is more consistent.
Therefore, considering the higher variability in the math book data, it is not a valid inference to conclude that the grammar book has more words per page solely based on the mean comparison.
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John makes deposits of $500 today and again in three years into a fund that gains interest according to
a force of interest of 0.06 for the first three years, and
an effective rate of discount of 8% after that.
John withdraws the whole balance X six years after his initial deposit.
a) Find the amount that John withdraws. Round to the nearest .xx
b) Find the annual effective yield rate for John's six year investment. Solve any equations ALGEBRAICALLY without using software. Round to the nearest .xx%.
a) John withdraws $1,300.
b) The annual effective yield rate for John's six-year investment is 2.09%.
a) To find the amount that John withdraws, we need to calculate the future value of his deposits after six years.
For the first three years, the deposits gain interest at a force of interest of 0.06. So after three years, the balance becomes $500 * (1 + 0.06)^3 = $595.44.
After three years, the interest rate changes to an effective rate of discount of 8%. Using the formula for the future value of a single sum with a discount rate, we can calculate the balance after six years:
$595.44 * (1 - 0.08)^3 = $429.97.
Therefore, John withdraws $429.97.
b) The annual effective yield rate can be found by calculating the rate of return on John's initial deposit over six years.
Let's assume John's initial deposit is $D. After three years, it grows to $D * (1 + 0.06)^3 = $1.191D. After six years, it becomes $1.191D * (1 - 0.08)^3 = $0.924D.
To find the annual effective yield rate, we need to solve the equation:
$D * (1 + r)^6 = $0.924D,
where r is the annual effective yield rate.
Simplifying the equation:
(1 + r)^6 = 0.924,
Taking the sixth root of both sides:
1 + r = 0.924^(1/6),
r = 0.0209.
Therefore, the annual effective yield rate for John's six-year investment is 2.09%.
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Your back yard is 20 feet long and 30 feet wide. You want to run a line from the front right corner of your yard to the back left corner. You would need an extra foot on either end for attaching the line to the fence. How much line do you need? Round your answer to the most appropriate whole number.
By using the Pythagorean theorem, we calculate that we need 38 feet of line You would need an extra foot on either end for attaching the line to the fence.
To find the length of the line needed, you can use the Pythagorean theorem, which states that in a right triangle, the square of the length of the hypotenuse (the line) is equal to the sum of the squares of the other two sides.
In this case, the two sides are the length (20 feet) and the width (30 feet) of the backyard. The line represents the hypotenuse.
Using the Pythagorean theorem, we can calculate the length of the line:
Line = √(Length² + Width²)
Line = √(20² + 30²)
Line = √(400 + 900)
Line = √1300
Line ≈ 36.06 feet
Since you need to add an extra foot on either end, the total length of the line needed would be:
Total length = Line + 2 feet
Total length ≈ 36.06 feet + 2 feet ≈ 38.06 feet
Rounding to the most appropriate whole number, you would need approximately 38 feet of line.
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(a) What was Jennifer’s gross pay for the year?
(b) How much did she pay in federal income tax?
(c) The amount in Box 4 is incorrect. Since Social Security is a 6.2% tax, what dollar amount should have been entered in Box 4?
(d) The amount in Box 6 is incorrect. Since Medicare is a 1.45% tax, what dollar amount should have been entered in Box 6?
(e) How much was Jennifer’s FICA tax (using the corrected values from (c) and (d))?
(f) Jennifer’s taxable income was $32,854. She’s filing her taxes as single. Does she owe the government more money in taxes, or will she receive a refund? How much money will she owe or receive? Explain your thinking process in your own words to earn full credit.
refer to images for help
Jennifer’s gross pay for the year was $32,854. B: She paid $3,982.48 in federal income tax. C:$1,971.24, D:$476.38, E: $2,447.62.
We have given the images
We have to determine the statements a,b,c,d e, and f.
What is the tax?
A tax is a compulsory financial charge or some other type of levy imposed on a taxpayer by a governmental organization in order to fund government spending and various public expenditures.
A: Jennifer’s gross pay for the year was $32,854.
B: She paid $3,982.48 in federal income tax.
C:$1,971.24
D:$476.38
E: $2,447.62
F:Jennifer will receive a refund. She will receive $231.48 in her tax refund because her income is $32,854 and she filed for taxes under the status that she is single so she only needs to pay $3,751 in Taxes but she ended up paying $3,982.48 which is $231.48 over how much she should’ve paid.
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What is the value of x?
Answer:
C
24Step-by-step explanation:
Trust me on this one.
The altitude to the hypotenuse of a right triangle divides the hypotenuse into segments 2 cm and 8 cm long. Find the length of the altitude to the hypotenuse? (Round to the nearest whole number). What is the Altitude ?
Answer:
Altitude of the right triangle is 4 cm.
Step-by-step explanation:
The altitude divides the right triangle's hypotenuse as 2 cm and 8 cm long.Let's use formula for similar right triangles proportional equation.I'll show you the diagram with steps.