A function that is injective but not surjective

Answers

Answer 1
An example of an injective function R→R that is not surjective is h(x)=ex. This "hits" all of the positive reals, but misses zero and all of the negative reals. But the key point is the the definitions of injective and surjective depend almost completely on the choice of range and domain.

Related Questions

I need help with this​

Answers

9514 1404 393

Answer:

  4

Step-by-step explanation:

Dilation centered at the origin multiplies each individual coordinate by the scale factor. Considering the x-coordinates of W and W', we have ...

  scale factor = Wx'/Wx = -12/-3 = 4

The dilation scale factor is 4.

Nathan usually drinks 39 ounces of water per day. He read that he should drink 74 ounces of water per day. If he starts drinking 74 ounces, what is the percent increase? Round to the nearest percent.​

Answers

Answer: 190%

Step-by-step explanation: Have a good night

Answer: STOP DELETING MY answers YOUR JUST TRYING TO TAKE PINTS AWAY FROM ME

Step-by-step explanation:

A grocery store sells avocados for $1.25 each. The graph shows the cost for different numbers of avocados.

Drag each list, statement, or equation below to show whether it describes the independent quantity, the dependent quantity, or neither.

Answers

Answer:

A grocery store sells avocados for $1.25 each. The graph shows the cost for different numbers of avocados.

Drag each list, statement, or equation below to show whether it describes the independent quantity, the dependent quantity, or neither.

Step-by-step explanation:

I don't know what it means

Answers

Answer:   x + 1 = 15

Step-by-step explanation:

solve -

x= 15 - 1

x = 14

x is a variable so it's not fix value in math

PLEASE HELP!!! In the diagram, line AB is a perpendicular bisector of segment CD. What is the length of CD?

Answers

Answer:

12

Step-by-step explanation:

AD is 6. a bisector splits a line in half. X would equal 6 meaning AD would equal 12.

Alfonso can do a certan job in 1 hour. His brother can do the same job in 1 hour however, their older sister Josefa can do this jobin 45 minute. If all three work together, how long will it take them to do the job?​

Answers

Answer: About 13 minutes. Not entirely sure if I'm correct

Please HELP me!

Thank You!

Answers

Answer:

I wish I new

Step-by-step explanation:

first you go to a different person to find out the answer next just get smarter

Answer:

Its D -6x+2=-15

Hope I help :)

Can you please mark me BrainIIest Please and thank you

Step-by-step explanation:

round 861 to the nearest ten. Enter your answer in the box below.​

Answers

860. Round down, since your ones place contains a 1.

please mark brainliest and have a great day

Answer:

860

Step-by-step explanation:

because it's rounding to the nearest ten and its only 1 you round it to 60

Find the lcm of 4,5 and 8

Answers

It would be 40
4 * 10 = 40
5 * 8 = 40
8 * 5 = 40

Answer:

the lcm is 2 x 2 x 5 x 2 x 2 x 2

Step-by-step explanation:

If f(x) = x2 – 7x - 13 ; find the following.
find f(10)

Answers

F(x) = y
10= x2 - 7x -13
10= -5x -13
-10 -10
5x = -23


Answer is X = -23/5 or -4.6



on coordinate grid, point p is at (5,8) and point r is at (-1,-3). points q and a are a reflection of both points across the x-axis. what are the coordinates of Q and S?​

Answers

Answer:

q(5,-8) s(-1,3)

Step-by-step explanation:

you just have to add a negative to the y-axis point, if you reflect across the x-axis

What is the zero of r(x)=8/3
- 16?

Answers

Answer:

pretty sure it's no solution unless you wrote the equation wrong

Step-by-step explanation:

if you replace y with 0 (to find the roots or zeros) and solve for x then there is not a solution

anyone wanna be friends boys or girls:)

Answers

Sure we can be friends

Answer:

sure follow my insta uknow.dan28

Step-by-step explanation:

HELP PLS JUST FIND THE CORRECT ANSWER:

Answers

Answer:

The first one

Step-by-step explanation:

Answer:

{ 1,2,3,4,5,6,7}

True or false that a fraction is never a rational

Answers

Answer:

false

Step-by-step explanation:

hope it helps!

have a good day!

What is 77/42 simplified into a fraction? My son needs help and he’s balling over it i feel very bad.☺️

Answers

Answer:

77/44 = 1 and 3/4

Step-by-step explanation:

77/44 can be simplified to 7/4 if you divide the numerator and denominator by 11.

4 can go into 7/4 1 time which leaves a remainder of 3/4

I hope this helped!

1 5/6 42 goes into 77 once.


step by step explanation:
so the whole number would be 1
77-42=35
so it’d be 1 35/42
the greatest common factor of 35 and 42 is 7.
divide both by 7
place whole number in front
final answer: 1 5/6


hope this helps!

Reduce each ratio to its simplest form.
a. 17 : 102
b. 208⁄52
c. 54 to 2
d. 7 : 49

Answers

Answer:

a. 1 : 6

b. 4/1

c. 27 to 1

d. 1 : 7

Step-by-step explanation:

To reduce each ratio to its simplest form, find the greatest common factor(gcf) for both sides of the ratio and divide them by that number.

For example, in part a the greatest common factor is 17. Divide both sides of the ratio by 17:

17/17 = 1 and 102/17 = 6

The ratio becomes 1 : 6.

The gcf for part b is 52. The gcf for part c is 2 and the gcf for part d is 7.

Please Help Meee!!

11. A Fruit punch recipe contains 8 ounces of pineapple juice and makes enough punch for 20 servings

(a) If 150 servings need to be prepared for a party, how many ounces of pineapple juice are needed?

(b) How many servings will 20 ounces of pineapple juice produce? ​

Answers

A. There will be 60 ounces of pineapple juice needed. 150 servings divided by 20 servings is 7.5 servings. 7.5 servings times 8 ounces is 60 ounces.

B. You can make 50 servings of punch. 20 servings divided by 8 ounces is 2.5 ounces. 2.5 ounces times 20 ounces equals 50 servings.

Dilations: Triangle RST with vertices R(-5,1), S(-3,4), and T(2,-1): k=2

Answers

Answer:R’ (-10,2) S’(-6,8) T’(4,-2)

Step-by-step explanation:

Did it in class

After dilation of ΔRST with the given scale factor we have vertices of ΔR'S'T' as R'(-10, 2), S'(-6, 8) and T'(4, -2).

Given that, ΔRST with vertices R(-5,1), S(-3,4), and T(2,-1).

What is a dilation?

Dilation is the process of resizing or transforming an object. It is a transformation that makes the objects smaller or larger with the help of the given scale factor. The new figure obtained after dilation is called the image and the original image is called the pre-image.

Given, scale factor is k=2.

So, with using scale factor

R(-5,1)→2(-5, 1)= R'(-10, 2)

S(-3,4)→2(-3,4)=S'(-6, 8)

T(2,-1)→2(2,-1)=T'(4, -2)

Therefore, after dilation of ΔRST with the given scale factor we have vertices of ΔR'S'T' as R'(-10, 2), S'(-6, 8) and T'(4, -2).

To learn more about the dilation visit:

https://brainly.com/question/13176891.

#SPJ2

Mr. Rodriguez has owned his truck for 3 months. In that time, he has driven the truck a total of 45 miles.

How many miles has Mr. Rodriguez driven his truck in the 3 months?

Answers

Answer:

45 miles

Step-by-step explanation:

Answer:

15

Step-by-step explanation:

45 divided by 3 is 15

sorry, i'm not all that good when it comes to explaining things. just kept it simple:)

An ant is walking at a speed of 42 centimeters in 5 minutes. what rate did the ant walk

Answers

divide 42 cm. by 5 minutes, which leaves you with 8.4 cm/minute. hope this helps, please mark brainliest and have a great day

What's the answer for this question?

Answers

Answer:

6 but im not really sure

Step-by-step explanation:

If your car gets 34 miles per​ gallon, how much does it cost to drive 370 miles when gasoline costs ​$3.30 per​ gallon?
The cost is ​$
nothing.
​(Simplify your answer. Round to the nearest cent as​ needed.)

Answers

Answer:

Cost = 2.5*(380/33) = $28.79

Step-by-step explanation:

Which value in the set of values below is NOT a solution to the inequality 10- 2y ≥ 4?
Set: {1, 2, 3, 4}
1. 1
2. 2
3. 3
4. 4

Answers

Answer:

Option 4: 4 is the correct answer

Step-by-step explanation:

The given inequality is:

10- 2y ≥ 4

In order to check which value is not the solution to the inequality we have to put each value in the inequality. If the inequality is true for the value, it is the solution and it is not true then it is not the solution.

Putting y = 1

[tex]10-2y\geq 4\\10-2(1)\geq 4\\10-2\geq 4\\8\geq 4[/tex]

TRUE

Putting y=2

[tex]10-2y\geq 4\\10-2(2)\geq 4\\10-4\geq 4\\6\geq 4[/tex]

TRUE

Putting y=3

[tex]10-2y\geq 4\\10-2(3)\geq 4\\10-6\geq 4\\4\geq 4[/tex]

TRUE

Putting y=4

[tex]10-2y\geq 4\\10-2(4)\geq 4\\10-8\geq 4\\2\geq 4[/tex]

FALSE

The inequality is not true for y=4.

Hence,

Option 4: 4 is the correct answer

Decrease 400 by 17% I need help

Answers

the correct answer is 68

A child weighs 83 pounds. Given that 1 pound is equal to 16 ounces, how many ounces does the child weigh? A. 1,228 ounces B. 1,328 ounces 1,411 ounces D. 1,584 ounces C. A ir 100% of what numhor?​

Answers

a , sorry i just needed the point to ask questions

5/4 divided by 3/5= what fraction

Answers

Answer:

Improper fraction: 25/12

Mix number fraction: 2 1/12

Decimal: 2.083333333...

Step-by-step explanation:

5/4 divided by 3/5 is the same as 5/4 times 5/3

5 times 5/4 times 3

25/12

Answer:

25/12

Step-by-step explanation:

when dividing a fraction, you flip the divisor, so the 3/5 will become 5/3

when you flip the divisor, you flip the sign too, the sign right now is ÷

the opposite of ÷ is ×

so now you have 5/4 × 5/3

multiply the numerators: 5 x 5 = 25

multiply the denominators: 4 x 3 = 12

so now you have 25/12

this fraction cannot be simplified, so 25/12 is your answer

What is the volume of a rectangular prism with the following dimensions (5 in x 8 in x 11 in)​

Answers

440 is the answer hope this helped

what is the distance between the points (-6,7) and (-1,1)?

Answers

Answer:

8

Step-by-step explanation:

The user above is correct. The square root of 61 is equal to 7.810249676 which can be rounded up to 8.

Thien and her friends earned $80 washing cars. Thien received $30 from this amount.
What is Thien's share as a percentage of the total amount earned?

Answers

37.5%

You can just do 30/80
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