Statement 5.109. Letf:X→Ybe a function. Then the functionfis a bijection iff the relation{(y,x)∈Y×X∣(x,y)∈f}is a function.
Let f:X→Ybe a function. Then the function f is a bijection if the relation {(y ,x)∈Y×X∣ (x ,y)∈f} is a function.
Assume that X→Y is a bijective function.
i.e. f:X→Y is one-one and onto function.
so different elements in X have different images in Y
and b ∈ Y there exists a ∈ X such that f(a)=b.
R= {(y ,x)∈Y×X∣(x ,y)∈f} is a relation
we wish to prove R is a function.
R is a relation from Y to X
let Y∈Y by assumption f is bijection function from X to Y
for all y ∈ Y there exists X∈ X such that f(x)=y.
so for every element in Y there is mapping element in X.
if (x ,y) ∈ f then (y ,x) ∈ R
therefore R is a function.
let X1, X2, ∈ X then there exists some y1, y2,∈ y such that
take f ( x1 )= y1 and f( x2)=y2
by assumption R is a function from Y to X that is inverse of f is existing means f is bijection.
for bijective functions only inverse exists.
If f:X→Y is a function. Then the function f is a bijection if the relation
{(y ,x)∈Y×X∣(x, y)∈f} is a function.
To learn About bijection:
https://brainly.com/question/14871175
#spj4
Please help me I just look at the photo I am so confused
Answer:
Grandma=P
Wagon=TH
Library= PL
Step-by-step explanation:
its pretty simple
For each system of equations, which operation will eliminate one of the variable? 2x+7y=32 and 2x+y=8
By subtraction, the variable x will eliminate and we will find out the value of y in the given system of equations.
What is the equation?There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.
The equation must be constrained with some constraints.
As per the given system of equations,
2x + 7y = 32 and 2x + y = 8
Subtract both equations from each other,
(2x + 7y) - (2x + y) = 32 - 8
2x + 7y - 2x - y = 24
2x - 2x + 7y - y = 24
6y = 24
y = 4
Hence "By subtraction, the variable x will eliminate and we will find out the value of y in the given system of equations".
For more about the equation,
brainly.com/question/10413253
#SPJ1
10. A bag contains marbles: 5 purple, 6 blue, 8 yellow, 1 green. You will draw a
marble, keep it, and then draw another. What is the probability that you will
draw a purple and a green? SHOW YOUR WORK. Make sure to simplify your
answer if using a fraction. If using a percent, round to the nearest hundredth
after you change it to a percent.
Answer:
1st darw
[tex] p(purple)= \frac{5}{20} \\ = \frac{1}{4} [/tex]
[tex]p(green) = \frac{1}{20} [/tex]
2nd draw
[tex]p(purple) = \frac{4}{18} \\ = \frac{2}{9} [/tex]
[tex]p(green) = 0[/tex]
zero and negative exponents result from applying properties of exponents. for example, zero indicates that the same number of repeated factors of a non-zero base was found in both the numerator and denominator of an expression.
The question is incomplete , I am answering it with my general knowledge,
Zero exponent
Simplifying an expression with a 0 as the exponent does not need consideration of the base value.
Any non-zero number multiplied by 0 has the value 1.
x0 = 1, where x = 0 and x = 1, 2, 3, and so forth.
Negative exponent
For any positive integer m and non-zero number a,
a⁻ⁿ=1/a⁻ⁿ
This rule states that if the exponent is negative, it can be made positive by writing the same number in the denominator and writing one for the numerator.
When a number is positive, the exponent shows how many times it has been multiplied by itself.
On the other hand, the negative exponent indicates how many times we must divide the base number. The negative exponent, then, tells us how many times to multiply the reciprocal of the base, to put it another way.
To learn more about exponents
brainly.com/question/26659533
#SPJ4
CAN SOMEONE HELP WITH THIS QUESTION?✨
The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.
The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.
The equation of the form y = A[tex]2^x[/tex] + K from the graph above is
y = (-5/3) . [tex]2^x[/tex] - (2/3)
What are coordinates in a graph?The coordinates in a graph indicate the location of a point with respect to the x-axis and y-axis.
The coordinates in a graph show the relationship between the information plotted on the given x-axis and y-axis.
We have,
y = [tex]2^x[/tex]
From the graph, we see that,
x = 0, y = -1
x = 1, y = -4
Now,
The equation in the form of y = A.[tex]2^x[/tex] + K can be written as,
Taking (0, -1) we get,
-1 = A x 1 + K
-1 = A + K ______(1)
Now,
Taking (1, -4) we get,
-4 = A x 2 + K
-4 = 2A + K _____(2)
From (1) and (2) we get,
A = K - 1 putting in (2) we get,
-4 = 2(K - 1) + K
-4 = 2K - 2 + K
-4 = 3K - 2
3K = -4 + 2
3K = -2
K = -2/3
Now,
A = K - 1
A = -2/3 - 1
A = (-2 - 3) / 3
A = -5/3
Now,
The equation is y = (-5/3) . [tex]2^x[/tex] - (2/3)
Thus,
The equation of the form y = A[tex]2^x[/tex] + K from the graph above is
y = (-5/3) . [tex]2^x[/tex] - (2/3)
Learn more about coordinates here:
https://brainly.com/question/13118993
#SPJ1
Question
What is the net signed area between f(x) = 2x-6 and the x-axis over the interval [-8,5]? Do not include any units in
your answer
Provide your answer below:
The net signed area of f(x) = 2x - 6 on the interval [-8, 5] is - 21 units.
What is the net signed area?The definite integral can be used to calculate the net signed area, which is the area above the x-axis less the area below the x-axis.
Given, f(x) = 2x - 6 and the x-axis over the interval [-8 , 5].
∴ The net signed area is,[tex]\[ \int_{-8}^{5} 2x -6 \,dx \][/tex].
[tex]= \[ \int_{-8}^{5} 2x \,dx \ - \ \int_{-8}^{5} 6 \,dx \][/tex].
= (5)² - (-8)² - {(5×6) - (-8×6)}.
= 25 - 64 - 30 + 48.
= - 21 units.
learn more about net signed area here :
https://brainly.com/question/22867526
#SPJ1
19) A parking garage charges the rates in the table below. What is the rate of change? Don't forget your units.
The rate of change is not constant.
What is rate of change ?
A rate of change is a measurement of how one quantity alters in proportion to another. The dependent variable y must be present if independent variable x is. rate of change = y-to-x conversion of change. Change rates may be positive or negative.
We know that the rate of change in a function is given by :-
(change in dependent variable) / (change in independent variable)
Let x denotes the Number of hours and y denotes the Cost of parking .
Here , x- independent variable
y- dependent variable
Now, rate of change = ( change in y) / ( change in x)
= (14-10)/(3-1) = 2
Here , the rate of change = $ 2 per hour.
Again rate of change = ( change in y) / ( change in x)
= (16-14)/(5-3) = 1
Here , the rate of change = $ 1 per hour.
Since both rate of changes are not equal , it means the rate of change is not constant.
To learn more about the rate of change from the given link
https://brainly.com/question/25184007
#SPJ4
Ver en español
The volume of this cylinder is 1,570 cubic inches. What is the radius?
Use ≈ 3.14 and round your answer to the nearest hundredth.
Therefore ,the radius of the given cylinder is 10 inches
What is volume ?A three-dimensional space's occupied volume is measured. It is frequently expressed as a numerical value using SI-derived units, other imperial units, or US customary units. Volume definition and length definition are connected.
Here,
The volume of the cylinder is 1570 cubic inches
Volume of the cylinder = 1570 cubic inches
Volume of cylinder = π[tex]r^{2}[/tex]h
Where r is the radius of cylinder
h is the height of cylinder
So,
Volume of the cylinder = 1570 cubic inches
=> 1570 = π[tex]r^{2}[/tex]h
=> 1570 = 3.14*[tex]r^{2}[/tex]*5
=> 1570/3.14 = [tex]r^{2}[/tex]*5
=> 500=[tex]r^{2}[/tex] *5
=> 500/5 =[tex]r^{2}[/tex]
=>100 =[tex]r^{2}[/tex]
=>r=10 inches
Therefore the radius of the given cylinder is 10 inches.
To know more about Volume , visit
https://brainly.com/question/23477586
#SPJ1
What is the domain of the graph? *
{-5,-4,-3,-1,0,2,4}
All real numbers
{-5,-4,-3,-1}
{-4,0,2,4}
The domain of the graph is {-5,-4,-3,-1}.
How can I determine a graph's domain?
Graphs can be used as another tool for determining the domain and range of functions. The domain of a graph is made up of all the input values displayed on the x-axis since the term "domain" refers to the set of potential input values. The y-axis on a graph represents the possible output values, or range.Consider the function y = f(x), which has the independent variable x and the dependent variable y. A value for x is said to be in the domain of a function f if it successfully allows the production of a single value y using another value for x.To know more about domain check the below link:
https://brainly.com/question/26098895
#SPJ4
(TONS OF POINTS AND BRAINLYEST)
Please answer the question that is stated in the image below. Thank you. It really means a lot to me.
Answer:
Below
Step-by-step explanation:
a) they won 120 games out of 369 played = 40/23=.325
b) they lost 248 out of 369 played = 248/369 = .672
c) Home games are 185 out of 369 = .501
d ) at home they won 72 out of (72+112+1) = 72/ 185 = .389
Complete the process of solving the equation.
Fill in all missing terms and select all missing descriptions. Simplify any fractions.
The missing terms are 34t and 0.
Solving Linear Equations:Finding the solution to linear equations in one, two, three, or more variables is referred to as solving a linear equation. In simple words, finding the values that satisfy a Linear equation.
Here we have
Equation 3(18t +1) = 20t +3
Let's solve the given expression to get the missing step
=> 3(18t +1) = 20t +3
Multiply (18t + 1) by 3
=> 54t + 3 = 20t + 3
Subtract 3 from both sides
=> 54t + 3 - 3 = 20t + 3 - 3
=> 54t = 20t
Subtract 20t from both sides
=> 54t - 20t = 20t - 20t
=> 34t = 0
Divide by 34 into both sides
=> 34t/34 = 0/34
=> t = 0
Therefore,
The missing terms are 34t and 0.
Learn more bout Linear Equations at
brainly.com/question/11897796
#SPJ4
Which expression is equivalent to (3+4i)(2−3i)
The expression that is equivalent to the given value would be = 18-i . That is option C.
What is an equivalent expression?An equivalent expression is defined as the type of expression that is similar to a given value when simplified.
The given expression = ( 3 + 4i) ( 2 - 3i)
Expand the given expression by removing the brackets as follows:
= =2(3+4i)−3i(3+4i)
=(6+8i)−(9i−12)
= (6+12)+i(8−9)
=18−i.
Learn more about multiplication equation here:
https://brainly.com/question/28552292
#SPJ1
In how many ways can a committee of five Democrats and four
Republicans be formed from a group of twelve Democrats and twelve
Republicans?
Answer:
392040 ways------------------------------
Find the combination of 4 of 12 and 5 of 12:
C(12, 4) × C(12, 5) = 12!/(4!8!) × 12!/(5!7!) = 495 × 792 = 392040A can of campbell's chicken Noodles Soup has a diameter of 30 millimeters and a height of 5 inches Find the volume of the can in cubic millimeters
The volume of the can of campbell's chicken Noodles Soup in cubic millimeters is 89,725.5 cubic millimeters
What is the volume of the can?Volume of a cylinder = πr²h
Convert inch to millimeters:
1 inch = 25.4 millimeters5 inch = 127 millimetersHeight of the cylinder = 5 inches = 127 millimeters
Radius = diameter / 2
= 30 millimeters / 2
= 15 millimeters
Volume of a cylinder = πr²h
= 3.14 × 15² × 127
= 3.14 × 225 × 127
= 89,725.5 cubic millimeters
Consequently, the can of campbell's chicken Noodles Soup has a volume of 89,725.5 cubic millimeters
Read more on volume of a cylinder:
https://brainly.com/question/9554871
#SPJ1
what is 122222×2222221÷12
Answer:
The result of the calculation is approximately 22535940185.17
Step-by-step explanation:
To solve this problem, we can use the order of operations. First, we perform the multiplication:
122222 * 2222221 = 2704312822242
Then, we perform the division:
2704312822242 / 12 = 22535940185.17
For what value of X is the parallelogram a rhombus?
Answer:
x = 8
Step-by-step explanation:
a rhombus has all equal sides so this means that you must set them equal to each other
8x - 5 = 5x + 19
now subtract 5x to both sides
3x = 24
x = 8
that is your answer
Find the volume of the shaded solid. Round your answer to 2 decimal places if necessary. Use 3.14 when necessary.
Answer:
Volume of a cuboid = length x width x height
8 x 8 x 32 = 2048
Volume of a cylinder = πr^2h
r = diameter/2 = 8/2 = 4
π(4)^2(32) = π(16)(32) = 1607.68
Volume of the shaded solid:
2048 - 1607.68 = 440.32
The correct answer would be C) 440.32 m^3
what is the value of p?
The value of p, using the exterior angle property is 53°.
What is the exterior angle property of a triangle?
The exterior angle property of a triangle states that the sum of the measures of the two non-adjacent angles of a triangle is equal to the measure of the exterior angle of the triangle. This means that if a triangle has three interior angles, the measure of any non-adjacent angle of the triangle must be equal to the measure of the exterior angle of the triangle. This property is useful in solving for unknown angles when the measures of two angles are known. For example, if two angles of a triangle measure 30° and 45°, then the measure of the third angle must be 105°, which is the same measure of the exterior angle.
The Exterior angle is = Sum of the Interior opposite angles.
By using the exterior angle property, we can get the following:
p+p-13°=p+40°
=>p=40°+13°
=>p=53°
The value of p is 53°
To learn more about the exterior angle property of the triangle, visit the link below:
https://brainly.com/question/14256482
#SPJ1
John started his collection with 35 baseball cards and collects 4 new cards every week. Frank started the same collection with 50 baseball cards and collects 2 new cards every week. How long will it take John to collect more cards than Frank.
Answer: 8 weeks
Step-by-step explanation: It would take John 8 weeks to collect more basketball cards than Frank with 67 cards for John and 66 for Frank.
a pizza has a diameter of 20 inches.one slice of the pizza is perfectly cut from the centre at a 360° angle.what is the area of sector of the pizza
Answer: The diameter of a pizza is 20 inches.
(4, -22) and (9,-57)
|v-8| +13=29
help me solve for v
Hello,
I hope you and your family are doing well!
To solve for V, we can start by subtracting 13 from both sides of the equation:
|v-8| = 16
Since the absolute value of a number is always nonnegative, we know that the value inside the absolute value must be either positive or zero. This means that we have two possible cases to consider:
Case 1: v-8 > 0
In this case, we can drop the absolute value symbols and solve the equation:
v-8 = 16
v = 24
Case 2: v-8 = 0
In this case, we can drop the absolute value symbols and solve the equation:
v-8 = 0
v = 8
So the possible values of V are 8 and 24.
-----
Please click the heart, 5 stars and brainliest if you find this helpful. It does encourage me to help more students.
Happy Holidays!
Step-by-step explanation:
|v-8| + 13 = 29
subtract 13 from both sides
|v-8| = 16
form two equations:
v-8 = 16 -(v-8) = 16
v-8 = 16
add 8 to both sides
v = 24
-(v-8) = 16
-v+8 = 16
subtract 8 from both sides
-v = 8
divide both sides by a -1
v = -8
check work:
|v-8| + 13 = 29
|24-8| + 13 = 29
|16| + 13 = 29
29 = 29
|v-8| + 13 = 29
|-8-8| + 13 = 29
|-16| + 13 = 29
|-29| = 29
29 = 29
Combine the radicals
The combination of radical 5√27 - 17√3 is -2 √3, so option D is correct.
What are radicals?The opposite of an exponent, denoted by the symbol "√" and also known as the root, is a radical. The number before the symbol or radical is regarded as an index number or degree.
Given:
5√27 - 17√3
Simplify the value under roots,
5√(3 × 3 × 3) - 17√3
5 × 3 √3 - 17√3
√3 (15 - 17)
-2 √3
Therefore, the combination of radical 5√27 - 17√3 is -2 √3.
To know more about Radicals:
https://brainly.com/question/8020018
#SPJ1
The amount of money he earns is directly proportional to the number of hours he w The graph shows the amount of money, w dollars, he earns in t hours.
Find the constant of proportionality.
Answer: dollars per hour.
How much money does Jonathan earn after working 3 hours?
Answer:
55 I think if I'm wrong sorry
test the pair of events b and d for independence based on the following table. a b c total d 0.12 0.04 0.24 0.40 e 0.09 0.03 0.18 0.30 f 0.09 0.03 0.18 0.30 total 0.30 0.10 0.60 1.00 Are A and D independent or dependent and why? Select the correct answer below and fill in the answer boxes to complete your choice. A) A and D are dependent because P(AnD) equals P(A)P(D): P(AOD) = and P(AJP(D) = B) A and D are dependent because P(AnD) does not equal P(A)P(D): P(AnD) = and P(A)P(D) = C) A and D are independent because P(AnD) does not equal P(A)P(D): P(AnD) = and P(A)P(D) = D) A and D are independent because P(AOD) equals P(A)P(D): P(AnD) = and P(A)P(D) =
There must be no chance that d and e will happen. If the two occurrences cannot coexist, we can infer that they are not independent.
What is probability?Simply put, probability is the likelihood that something will occur. When we don't know how an event will turn out, we can discuss the likelihood or likelihood of several outcomes. Statistics is the study of events that follow a probability distribution.
What is the probability formula?P(A) = n(A)/n(S)
Where P(A) is the likelihood that an event "A" will occur and n(A) is the number of positive outcomes. The total number of occurrences in the sample space is denoted by n(S).
We must have a similar probability for both events in order for them to be independent. Because of the table, we may test for independence by knowing the likelihood that e and d will occur. When we are told that occurrences d and e are mutually exclusive, the entire table of values becomes somewhat of a red herring. The chance of d given e and the probability of d given d are both equal to zero if two events are mutually incompatible. There must be no chance that d and e will happen. If the two occurrences cannot coexist, we can infer that they are not independent. There is a chance for it.
to learn more about probability visit:
https://brainly.com/question/29381779
#SPJ4
What is the probability that out of 125 babies born, at least 50 will be girls? Assume that boys and girls are equally probable, and round your answer to the nearest tenth of a percent.
When boys and girls are equally likely, the likelihood that at least 50 of 125 infants born will be females is 0.40.
What is probability?Probability is an area of mathematics that deals with numerical representations of how probable an event is to occur or how likely a statement is to be true. The probability of an occurrence is a number between 0 and 1, where 0 denotes the event's impossibility and 1 represents certainty. A probability is a number that represents the possibility or chance that a specific event will occur. Probabilities can be stated as proportions ranging from 0 to 1, as well as percentages ranging from 0% to 100%.
Here,
total number of sample=125
number of girls=50
Probability that out of 125 babies born, at least 50 will be girls,
=50/125
=0.40
The probability that out of 125 babies born, at least 50 will be girls is 0.40 when boys and girls are equally probable.
To know more about probability,
https://brainly.com/question/11234923
#SPJ1
4) Which ordered pair is a solution to the linear
inequality below?
y ≥ -2x + 7
A. (-1, 5)
B. (3, 2)
C. (2, -8)
D. (-4, 0)
Answer: B
Step-by-step explanation:
Answer:
B. (3, 2)
Step-by-step explanation:
When looking for a solution to an inequality you have to look for a point that is located in the shaded part of the inequality when graphed. B.) (3,2) is the only point that is located in the shaded part meaning that, that is a solution to the inequality
The length and width of a rectangle are consecutive integers. The perimeter of the
rectangle is 86 inches. Find the length and width of the rectangle.
The rectangle has the consecutive integers of 21 inches and 22 inches for its width and length respectively.
What are consecutive integersConsecutive integers are numbers that follow in a particular order, usually just one after the for example, 1, 2, 3,... and so on.
Let the width of the rectangle be represented by x so that the length will be x + 1 as they consecutive integers
The perimeter of the rectangle will have the equation;
x + x + x + 1 + x + 1 = 86 inches
4x + 2 = 86 inches {collect like terms}
4x = (86 - 2) inches {subtract 2 from both sides of the equation}
4x = 84 inches
x = (84/4) inches {divide through by the coefficient of x}
x = 21 inches
Therefore, the rectangle has width of 21 inches and length of 21 + 1 = 22inches.
Learn more about rectangle here:https://brainly.com/question/19819849
#SPJ1
Question 1
Match the sample description with the type of sample that was taken.
Names of all high school students are placed on slips of paper in a box and 10 are chosen.________
Fifteen students are randomly selected from each grade level.______
A high school is divided into classrooms and one classroom is selected._______
All high school students eating lunch at 11 am.______
All students in the school are listed in alphabetical order and every 50th name is chosen._______
The sampling types in this problem are given as follows:
Names of all high school students are placed on slips of paper in a box and 10 are chosen -> Random.Fifteen students are randomly selected from each grade level -> Stratified.A high school is divided into classrooms and one classroom is selected -> Cluster.All high school students eating lunch at 11 am -> Convenient.All students in the school are listed in alphabetical order and every 50th name is chosen -> Systematic.What are the sampling types?The sampling types used in this problem are defined as follows:
Random: all options are listed as options and then some are selected.Convenient: all the options are at some place such as the cafeteria then some are selected.Systematic: one of each n elements is chosen.Cluster: options are divided into groups, and then one group is selected.Stratified: options are divided into groups, and then a proportion of each group is chosen.More can be learned about the types of sampling at https://brainly.com/question/9910540
#SPJ1