The following questions concern one-to-one and onto functions.

a) Let A = {1, 2, 3, 4, 5}, and B = {0, 3, 5, 7}. Can you find a one-to-one function from A to B? Can you find an onto function from A to B? Explain your answers.

b) Let A = {x ∣ x is a vowel }, and let B = {x ∣ x is a letter in the word "little" }. Can you find a one-to-one function from A to B? Can you find an onto function from A to B? Explain your answers.

c) Let A = {x ∈ Z ∣ x is a multiple of 2}, and let B = {x ∈ Z ∣ x is a multiple of 4}. Can you find a one-to-one function from A to B? Can you find an onto function from A to B? Explain your answers

Answers

Answer 1

a. No, there is no one-to-one function from A to B; A has more elements

There is also no onto function from A to B because B has less elements

b. Yes, we can find a one-to-one function from A to B; we can map the vowels from A to B

No, we cannot find an onto function from A to B because there are more vowels in set A

c. Yes, a one-to-one function from A to B is defined because  f(x) = 2x, and x is an element of A.

No,  we cannot find an onto function from A to B because B contains elements that are not multiples of 2.

What is a one - to -one function?

One-to-One function defines that each element of one set, say Set (A) is mapped with a unique element of another set, say, Set (B)

However, A function f from A to B is called onto if for all b in B there is an a in A such that f(a) = b. That is, all elements in B are used.

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Related Questions

MARK BRAINLIESTTTTTT

Answers

Answer:

i think its c hope it helps

Step-by-step explanation:

please help------------,​

Answers

Answer:

600 cm²

Step-by-step explanation:

The shaded area (A) is calculated as

A = area of square - ( area of 3 unshaded triangles )

area of square = 40 × 40 = 1600 cm²

area of lower right triangle = [tex]\frac{1}{2}[/tex] × 20 × 40 = 10 × 40 = 400 cm²

area of upper left triangle = [tex]\frac{1}{2}[/tex] × 40 × 20 = 20 × 20 = 400 cm²

area of lower left triangle = [tex]\frac{1}{2}[/tex] × 20 × 20 = 10 × 20 = 200 cm²

Then

A = 1600 - (400 + 400 + 200 ) = 1600 - 1000 = 600 cm²

Calculate each value for ⊙P. Use 3.14 for π and round to the nearest tenth.

please help!! will mark brainliest!!

Answers

Answer:

226.19 inches

Step-by-step explanation:

Find the total surface area of this cone. Leave your answer in terms of pie.

Answers

Answer:

90[tex]\pi[/tex]

Step-by-step explanation:

if you want explanation say in comments

In the diagram linem is parallel to linen
with a transversal linet.
Which of the below terms best describe
the relationship between <3 and <4?

Answers

Answer:

Alternate exterior angles

Step-by-step explanation:

If they shared a vertex, they would be vertical angles, but since they are on different lines, and alternate sides, the dark blue (alternate exterior angles) answer is correct.

PLEASE HELP HURRY WILL GIVE BRAINLIST IF CORRECT

Answers

Answer:

26 per week

Step-by-step explanation:

The measures of the angles of a triangle are shown in the figure below. Solve for x.

Answers

Answer:  x = 10

Step-by-step explanation:

The sum of interior angles in a triangle is equal to 180°.

(2x + 3) + (5x + 17) + 90 = 180

2x + 3 + 5x + 17 + 90 = 180

7x + 110 = 180

7x = 70

x = 10

what are three ways you can solve a proportion?

Answers

Answer:

horizontal

vertical

diagonal

Step-by-step explanation:

I guess I only know those.hope it helps you

rebecca’s electric bill is a variable expense. what is the average amount she pays for electricity if she paid $135 in december, $129 in january, $99 in february, $120 in march and $140 in april?

Answers

The average amount Rebecca pays for electricity based on the given data is $124.60.

To calculate the average, we add up the amounts she paid in each month and then divide by the total number of months. In this case, the sum of her payments is $135 + $129 + $99 + $120 + $140 = $623. Dividing this sum by the total number of months (5), we get an average of $623 / 5 = $124.60. Calculating the average helps us determine the typical amount Rebecca pays for electricity based on the given data. It provides an overall picture of her average expenses in the specified period.

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For the following argument, construct a proof of the conclusion from the given premises, -(3x) (PX Mx), (3x) (Mx Sx) 1:. -(x) (SxPx)

Answers

To construct a proof of the conclusion "-(∀x) (S(x) ∧ P(x))" from the given premises "-(3x) (P(x) ∧ M(x))" and "(3x) (M(x) ∧ S(x))," we can use a proof by contradiction.

We will assume the negation of the conclusion and derive a contradiction. Here's the proof:

-(∀x) (S(x) ∧ P(x)) (Assumption)
(3x) (P(x) ∧ M(x)) (Given premise)
(3x) (M(x) ∧ S(x)) (Given premise)
P(a) ∧ M(a) (Existential instantiation from 2)
M(a) ∧ S(a) (Existential instantiation from 3)
M(a) (Simplification from 5)
P(a) ∧ M(a) (Repetition from 4)
-(P(a) ∧ M(a)) (Negation introduction from 7)
-(P(a) ∧ M(a)) ∧ M(a) (Conjunction introduction with 6 and 8)
-M(a) (Simplification from 9)
P(a) ∧ M(a) (Repetition from 4)
P(a) ∧ M(a) ∧ -M(a) (Conjunction introduction with 10 and 11)
⊥ (Contradiction introduction from 12)
-(∀x) (S(x) ∧ P(x)) (Negation introduction from 1-13)

Therefore, we have derived a contradiction, which allows us to conclude that the negation of the assumption is false. Thus, we can conclude:

-(∀x) (S(x) ∧ P(x))

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Tell whether the angles are adjacent or vertical. Then find the value of X

Answers

Answer:

The angles are adjacent, and x=100

Step-by-step explanation:

The angles are adjacent because they share the same starting point. x=100 because x and the other angle are on a line, which has a measure of 180 degrees. We subtract 80 from 180 to get 100.

Hope this was helpful.

~cloud

I dont know if this is exactly correct but anyways

x + 80 = 180
-80 -80
x = 100

If youre comparing angle x and 80, it would be adjacent

What is the Median for the Box & Whisker Plot below?

HELP PLEASEE

Answers

Answer:

20

Step-by-step explanation:

what is the midline equation of y= 7sin (3pi/4 x - pi/4) +6

Answers

Answer: 6

Step-by-step explanation:

Answer: y=6

Step-by-step explanation:

13. What is the quadratic function that has a graph that contains the points
{(-1,8), (0,5),(1,0))?
A g(x) = -x2 - 4x + 5
B g(x) = -x2 +5
C g(x) = -x2 + 7x + 5
D g(x) = -x2 + 4x + 5

Answers

Answer: D, i am a hight school teacher names miss smell my butt, and i know that i am right

Hello um I need help if anyone could help me with this that would be perfect:))!!

Answers

Answer:

1. If D= whole numbers then the answer is B.0 if it is integers the answer is A.-10

2. The answer is D. That number is an irrational number.

Step-by-step explanation:

Im pretty sure that #1 is B.0, but since there are no labels and i haven't done this in a while, I wasn't quite sure. Sorry.

Pls help and thank youuuuu:)

Answers

Answer:

22

Step-by-step explanation:

according to your question

All real solutions of the equation.

Answers

All possible solutions would be : 7 and -1

In this problem, y=c₁ece is a two-parameter family of solutions of the second-order DE y-y-0. Find a solution of the second-order TVP consisting of this differential equation and the given initial conditions. y(-1)=2 y(-1) = -2;

Answers

The solution of the second-order differential equation y'' - y' = 0 with the given initial conditions y(-1) = 2 and y'(-1) = -2 is y(x) = 2e^x - 4e^-x.

To find a solution to the second-order differential equation y'' - y' = 0, we first solve the characteristic equation by assuming a solution of the form y(x) = e^(rx). Plugging this into the differential equation, we get r^2e^(rx) - re^(rx) = 0. Factoring out e^(rx), we have e^(rx)(r^2 - r) = 0. This gives us two possible values for r: r = 0 and r = 1.

For r = 0, the corresponding solution is y₁(x) = c₁, where c₁ is a constant.

For r = 1, the corresponding solution is y₂(x) = c₂e^x, where c₂ is a constant.

To find the particular solution that satisfies the given initial conditions, we substitute the values of x = -1, y(-1) = 2, and y'(-1) = -2 into the general solution. This gives us the equations 2 = c₁ and -2 = c₂e^-1. Solving for c₁ and c₂, we find c₁ = 2 and c₂ = -2e.

Therefore, the solution to the second-order differential equation with the given initial conditions is y(x) = 2e^x - 4e^-x.

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The following data gives an approximation to the integral M = S'f(x) dx = 2.0282. Assume M = N,(h) + kyha + k_h* + ..., N,(h) = 2.2341, N, then N2(h) = 2.01333 1.95956 0.95957 2.23405

Answers

The value of N₂(h), for the following data gives an approximation to the integral M = [tex]\int\limits^1_0 {f(x)} \, dx[/tex]  N₁(h)= 2.2341 N₁(h/2) = 2.0282 is 0.8754. So, none of the options are correct.

Given that N₁(h)= 2.2341 and N₁(h/2) = 2.0282.

Applying Richardson's extrapolation method, we can find the value of the definite integral M using the formula,

M = N₁(h) + k₂h² + k₄h⁴ + ...

Therefore, we have to find the value of N₂(h).

Here, h = 1 - 0 = 1.

N₂(h) can be obtained by the formula,

[tex]N_2(h) = \frac{(2^2 * N_1(h/2)) - N_1(h)}{2^2 - 1}[/tex] , Substituting the data values we get,

[tex]N_2(h) =\frac{(2^2 * 2.0282) - 2.2341}{2^2 - 1}[/tex]

[tex]N_2(h)= \frac{8.1128 - 2.2341}{3}[/tex]

[tex]N_2(h)=\frac{2.6263 }{3}[/tex]

[tex]N_2(h)=0.8754333 = 0.8754[/tex]

Therefore, none of the option is correct.

The question should be:

The following data gives an approximation to the integral M =  [tex]\int\limits^1_0 {f(x)} \, dx[/tex]  N₁(h)= 2.2341 N₁(h/2) = 2.0282. Assume M = N₁(h) + k₂h² + k₄h⁴ + ... then, N₂(h) =

a. 2.01333

b. 1.95956

c. 0.95957

d. 2.23405

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let W be the subspace of spanned by the vectors [3 1 1] and [15 11 -1]
find the projection matrix that projects vectors in R3 onto W.
P=

Answers

The projection matrix P is [1/√11 -1/√337].

To find the projection matrix that projects vectors in ℝ³ onto the subspace W spanned by the vectors [3 1 1] and [15 11 -1], we can follow these steps:

Let's start by normalizing the basis vectors of W. Normalizing means dividing each vector by its magnitude to obtain unit vectors.

First basis vector:

u₁ = [3 1 1]

Normalize: v₁ = u₁ / ||u₁||

Compute the magnitude: ||u₁|| = √(3² + 1² + 1²) = √11

Normalize: v₁ = [3/√11, 1/√11, 1/√11]

Second basis vector:

u₂ = [15 11 -1]

Normalize: v₂ = u₂ / ||u₂||

Compute the magnitude: ||u₂|| = √(15² + 11² + (-1)²) = √337

Normalize: v₂ = [15/√337, 11/√337, -1/√337]

Next, we construct a matrix P using the normalized basis vectors as columns.

P = [v₁ v₂]

P = [3/√11 15/√337]

[1/√11 11/√337]

[1/√11 -1/√337]

Therefore, the projection matrix P that projects vectors in ℝ³ onto the subspace W spanned by the vectors [3 1 1] and [15 11 -1] is:

P = [3/√11 15/√337]

[1/√11 11/√337]

[1/√11 -1/√337]

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Find the distance between the two points rounding to the nearest tenth (if necessary). (-1,8) and (8,5)​

Answers

Your answer to is 9.5

Suppose that the number of defects on a roll of magnetic recording tape has a Poisson distribution for which the mean A is either 1.0 or 1.5, and the prior probability mass function of A is as follows: (1.0) = 0.4 and (1.5) = 0.6. If a roll of tape selected at random is found to have four defects, what is the posterior probability mass function of X? The posterior p.m.f is____.

Answers

The posterior probability mass function of X is given below:0.4 * 0.0183 = 0.00732.0.6 * 0.0513 = 0.03078. Posterior Probability Mass Function of X: ____0.00732 if A = 1.0.____0.03078 if A = 1.5.

Explanation: The probability mass function for Poisson distribution is given by: P(X = x) = (e^-λ * λ^x) / x!Where,λ is the mean. The given prior probability mass function of A is P (A = 1.0) = 0.4P(A = 1.5) = 0.6.

Thus, the mean is either A = 1.0 or A = 1.5.

Now, let X be the number of defects on a roll of tape. Using the law of total probability, the probability mass function of X is P (X = x) = P (X = x, A = 1.0) + P (X = x, A = 1.5)

Using Bayes' theorem, the posterior probability mass function is given by: P (A = 1.0 | X = 4) = P (X = 4 | A = 1.0) * P (A = 1.0) / P (X = 4) P (A = 1.5 | X = 4) = P (X = 4 | A = 1.5) * P (A = 1.5) / P (X = 4)

Now, we need to calculate P (X = 4 | A = 1.0) and P (X = 4 | A = 1.5) using the Poisson distribution.

P (X = 4 | A = 1.0) = (e^-1 * 1^4) / 4! = 0.0183.P(X = 4 | A = 1.5) = (e^-1.5 * 1.5^4) / 4! = 0.0513.

Now, we need to calculate the value of the denominator,

P (X = 4). P (X = 4) = P (X = 4, A = 1.0) + P (X = 4, A = 1.5) = P (X = 4 | A = 1.0) * P (A = 1.0) + P (X = 4 | A = 1.5) * P (A = 1.5)

Put the values: P (X = 4) = (0.0183 * 0.4) + (0.0513 * 0.6) = 0.0342.

Put the values in the above posterior probability mass function equations,

we get: P (A = 1.0 | X = 4) = 0.00732 and P (A = 1.5 | X = 4) = 0.03078.

Therefore, the posterior probability mass function of X is:0.00732 if A = 1.0.0.03078 if A = 1.5.

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Find the distance between the two points.
(-4, 7), (4,0)
units.
The distance between the two points is

Answers

Answer: √113 or 10.63

Step-by-step explanation: the exact answer is √113, or 10.63 if you're looking for the decimal form

Step-by-step explanation:

Let the distance between two points A = (-4,7) and B = (4,0).

Here, x1 = -4 , y1 = 7

x2 = 4 , y2 = 0

Use the distance formula to find out the distance between two points are:

AB = √[(x2-x1)²+(y2-y1)²]

= √[{4-(-4)}²+(0-7)²]

= √[(4+4)²+(-7)²]

= √[(8)² + (-7)²]

= √[(8*8)+(-7*-7)]

= √[64+49]

= √[113] ⇛10.630 units approximately.

Based on the data shown below X 2 3 4 5 6 7 8 19 10 data 45.22 44.74 40.96 37.68 33.7 30.62 30.94 24.26 21.88 21.4 11 Find the correlation coefficient. What proportion of the variation in y can be explained by the variation in the values of x? Report answer as a percentage accurate to one decimal place.

Answers

There is a strong negative linear relationship between x and y, and almost all of the variation in y can be explained by the variation in x.

The correlation coefficient is -0.961 and the proportion of the variation in y that can be explained by the variation in the values of x is 92.3%.

The correlation coefficient measures the strength and direction of the linear relationship between two variables. In this case, the correlation coefficient between x and y is -0.961, which indicates a strong negative linear relationship between the two variables.

The coefficient of determination (r²) measures the proportion of the variation in y that can be explained by the variation in the values of x. In this case, the value of r² is 0.923, or 92.3%. This means that 92.3% of the variability in y can be explained by the variability in x. Therefore, there is a strong negative linear relationship between x and y, and almost all of the variation in y can be explained by the variation in x.

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Find the perimeter of the window to the nearest hundredth.



perimeter: about
ft

Answers

can you insert a picture?

Write the equation of the line graphed at the right(please help I really need this)

Answers

the correct answer is X= -3

Combine the like terms to create an equivalent expression for 4z−(−3z)

Answers

Answer:

7z

Step-by-step explanation:

Answer: 7z

Step-by-step explanation:

two negatives cancel into a positive, so -(-3z) is +3z. 4z + 3z = 7z

Find the volume of an oblique circular cylinder that has a radius of five feet and a height

of three feet

Answers

Answer:

235.5 cubic feet

Step-by-step explanation:

The volume v of a circular cylinder whose base radius is r and height h is given as

v = πr^2h

where π is 22/7 or 3.14

Given that the radius is five feet and the height  is three feet

the volume v = 3.14 *5^2 * 3

= 235.5 cubic feet

The volume of the oblique circular cylinder is 235.5 cubic feet

A custom fish tank shaped like a rectangular prism needs to have a length of 21 inches, a width of 16 inches and hold a volume of 6758 cubic inches. What height must the tank be made to meet these specifications?

Answers

Answer:

i dont know im not that smart ask someone else dude

Step-by-step explanation:

What is the best description of a food chain?
the competition among several species for the same food item
the transfer of energy from one organism to another

Answers

Answer:

the transfer of energy from one organism to another

Step-by-step explanation:

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Which of the following statements is NOT the reason of inefficiency of collectiviration? A. Farmers joining the cooperatives tend to free-ride on the contribu tion of other farmers B. Without owning land or other amets, the bargaining position of households are weakened, leading to low incentive to protect the col lective at C. The fixed wage or rutal system reduce the incentive of farmers to make more efforts. D. The double marginalization problems between farmers and the co- operatives reduce their incentive of making efforts. 18. Which of the following statements is NOT the economic reason of the efficiency gain in 1976? A. Households have ownership of production materials like tractors and draft animals. B. There is a technological improvement to replace large tractor by small tractors when cultivating fragmented land. C. The people's comme allocates the production roures in a more efficient way. D. Farmers have control rights over land use 19. Which of the following statements is NOT the feature of the rural household responsibility system in China? A. Production and labor decision belongs to hold B. The contracting and management rights of land go to the State C. Land ownership belongs to collective commune. D. The rights to circulate, rent, use and claim income from land go to individual households 20. Which of the following statements is NOT the strategy of rural revi talization for nowadays China? A. To develop scale economy B. To have pleasant living environments C. To improve governance efficiency D. To live instit Question 2 Suppose a firm is operating in its range of economies of scale, is on both its Long Run Average Cost (LRAC) curve and its short-run ATC curve. At that level of output, the slope of its LRAC curve is: Select one: A. negative and the slope of its ATC curve is zero. B. zero and the slope of its ATC curve is zero. C. zero and the slope of its ATC curve is negative. D. positive and the slope of the ATC curve is positive. E. negative and the slope of its ATC curve is negative.