Given a metric space M with metric d, verify that any ε-ball is an open set.

Answers

Answer 1

Answer:

Prove that for any x0∈X and any r>0, the open ball Br(xo) is open. My attempt: Let y∈Br(x0). By definition, d(y,x0)<r

Step-by-step explanation:

Prove that for any x0∈X and any r>0, the open ball Br(xo) is open. My attempt: Let y∈Br(x0). By definition, d(y,x0)<r

Answer 2
Prove that for any x0€X and any r>O, the open ball Br(xo) is open. My attempt: Let y€Br(x0). By definition, d(y,x0)



Related Questions

please please help!!

Answers

Answer:

A family buys 6 tickets to a show. they also pay a $3 parking fee. they spend $27 total.

A garden measuring 22 m by 26 m is to have a pedestrian pathway that is w meters wide installed all the way around it, increasing the total area to 780 square meters

a. Draw a picture.
b. Write an equation that can be used to determine the width, w of the pathway.
c. Explain how this equation models the situation.
d. Use this equation to solve for the width of the pathway

Answers

Answer:

4

Step-by-step explanation:

I know

Find the zeros from the factored form Quadratic Equation y=-x(x-3) ( ,0) & ( ,0)​

Answers

Answer:

(0, 0) and (3, 0)

Step-by-step explanation:

Zeros of any equation means, value of variable x at y = 0.

Given quadratic equation is,

y = -x(x - 3)

For y = 0,

-x(x - 3) = 0

x = 0

And (x - 3) = 0

x = 3

Therefore, x-intercepts of the given quadratic equation will be,

x = 0, 3

Points showing the x-intercepts will be,

(0, 0) and (3, 0)

Find the slope of the line passing through the points (-6-9) and (9,-9)
Find the slope of the line passing through the points (4,1) and (4,-5).

Answers

9514 1404 393

Answer:

zeroundefined

Step-by-step explanation:

The slope formula is useful for this.

  m = (y2 -y1)/(x2 -x1)

__

First line:

  m = (-9 -(-9))/(9 -(-6)) = 0/15 = 0

The slope of the first line is zero.

__

Second line:

  m = (-5-1)/(4 -4) = -6/0 = undefined

The slope of the second line is undefined.

_____

It is always a good idea to apply a little critical thinking to the given information. Here, you observe that the y-coordinates of the first pair of points are the same. That means this is a horizontal line, with a slope of 0.

Similarly, you observe that the x-coordinates of the second pair of points are the same. That means this is a vertical line, with undefined slope.

Hello there! We're provided with two problems in one, but we can solve each of them by using the slope formula, which is this:

[tex]\stackrel\diamond{\boxed{\boxed{\bold{\frac{y_2-y_1}{x_2-x_1}}}}}[/tex]

In this formula,

[tex]\sf{y_2=-9}[/tex][tex]\sf{y_1=-9}[/tex][tex]\sf{x_2=9}[/tex][tex]\sf{x-1=-6}[/tex]

Plug in the values:

[tex]\sf{\dfrac{-9-(-9)}{9-(-6)} =\dfrac{-9+9}{9+6} =\dfrac{0}{15} =\boxed{0}}[/tex]

So the slope is 0.

       <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

The second problem can be solved the same way!

Once again, we'll use the formula

[tex]\stackrel\diamond{\boxed{\boxed{\bold{\frac{y_2-y_1}{x_2-x_1}}}}}[/tex]

only this time, the values are different:

[tex]\sf{y_2=-5}[/tex][tex]\sf{y_1=1}[/tex][tex]\sf{x_2=4}[/tex][tex]\sf{x_1=4}[/tex]

Plug in the values:

[tex]\sf{\dfrac{-5-1}{4-4} =\dfrac{-6}{0} =\boxed{unde fined}[/tex]

So the slope's undefined. I hope this helps, feel free to comment if you have any queries regarding the slope formula! ^^

X 6.4.7-T
Question Help
Assume that females have pulse rates that are normally distributed with a mean of j = 74.0 beats per minute and a standard deviation of o = 12.5 beats per minute. Complete parts (a) through (c) below.
a. If 1 adult female is randomly selected, find the probability that her pulse rate is between 70 beats per minute and 78 beats per minute.
The probability is
(Round to four decimal places as needed.)
Enter your answer in the answer box and then click Check Answer
2 parts
remaining

Answers

Let X be a random variable denoting pulse rates of females as described, with mean µ = 74.0 bpm and standard deviation σ = 12.5 bpm. Then

P(70 < X < 78) = P((70 - µ)/σ < (X - µ)/σ < (78 - µ)/σ)

… = P(-0.32 < Z < 0.32)

… = P(Z < 0.32) - P(Z < -0.32)

… ≈ 0.6255 - 0.3745

… ≈ 0.2510

where Z is normally distributed with mean 0 and s.d. 1.

• • •

Next, you sample 25 females from the population and want to find the probability that their average falls between 70 and 78 bpm. Let [tex]X_i[/tex] denote the pulse rate of the i-th woman from the sample, and let Y be the random variable for the sample mean; that is,

[tex]Y=\displaystyle\sum_{i=1}^{25}\frac{X_i}{25}[/tex]

Recall that a sample of size n taken from a normal distribution with mean µ and s.d. σ has a mean that is also normally distributed with mean µ and s.d. σ/√n.

The mean stays the same, µ = 74.0, but now the s.d. is σ/√n = σ/5 = 2.5. So we have

P(70 < Y < 78) = P((70 - µ)/(σ/5) < (Y - µ)/(σ/5) < (78 - µ)/(σ/5))

… = P(-1.6 < Z < 1.6)

… = P(Z < 1.6) - P(Z < -1.6)

… ≈ 0.9452 - 0.0548

… ≈ 0.8904

Decide whether 2x+8 and 2(x+4)+4 are equivalent expressions. Explain how you know

Answers

Answer:

2x+8 and 2(x+4)+4 are not equivalent expressions

Step-by-step explanation:

Firs we need to expand 2(x+4)+4 using the distributive law as shown;

2(x+4)+4

=2(x) + 2(4) + 4

= 2x + 8 + 4

= 2x + 12

Since the result is not equivalent to 2x+8 hence 2x+8 and 2(x+4)+4 are not equivalent expressions

Haruto gave 42 of his paycheck to his mother. If his paycheck was 855 how much money did he give to his mother

Answers

Answer:

813

Step-by-step explanation:

Find f. (Use C for the constant of the first antiderivative and D for the constant of the second antiderivative.) f ''(x) = 2x + 5ex

Answers

Answer:

Step-by-step explanation:

f ''(x) = 2x + 5e^x

f '(x) =  x² + 5e^x + D

f (x) = 1/3 x³ + 5e^x + C

2. What is the acronym we use to remember the 7 most common
conjunctions? *
O FLAPELS
O FANBOYS
O FLAPGIRL
OSYOBNAF

Answers

Answer:

fanboys

Step-by-step explanation:

for

and

nor

but

or

yet

so

First anserw gets brainest 8th grade, root squared question

Answers

Answer:

±11

11*11=121

-11*-11=121

A leather jacket and printing paper are examples of what resources renewable or nonrenewable

Answers

Answer:

Renewable

Step-by-step explanation:

What is the precent to decrease from 400,000 to 60,000?

Answers

Step-by-step explanation:

340000 this is a answer ok

What is the unit rate for the following rate: 5 pounds of potatoes costs $10


Answers

Answer:

$2 per round of potatoes

Step-by-step explanation:

$10/5 pounds of potatoes= $2

0000 PLEASE ASAP HELPPPPP

Answers

x=12
Hope this helps!!

The total length of a road trip was 15.6 hours. If highway signs are posted every 0.06 hours, including one at the end of the road trip, how many highway signs will there be on the road trip?

Answers

Answer:

The answer is 260.

Step-by-step explanation:

15.6/.06=260.

A Playstation 5 gaming console is initially priced at $500 and the prices rises such that the new price is $550. What is the percent increase of the Playstation 5? Show all work, write answer using proper units.

Answers

Answer:

10%

Step-by-step explanation:

Percentage increases is given by the formula:

[tex]percentage \: increases = \frac{increases}{original \: value} [/tex]

Increases = $550 - $500 = $50

Original Value: $500

substitute the values into the formula

[tex]percentage \: increases = \frac{50}{500} \times 100[/tex]

= 10%

PLEASE PLEASE PLEASE HELPPPPP

Answers

Answer:

Step-by-step explanation:

B beacuse I did this before..

Will tutors ever come back??

Answers

Answer:

Step-by-step explanation:

I don't think so

Find the GCF of the terms of the polynomial.
1424 - 7023 + 1022

Answers

The answer is 10,176 that is the answer

does anyone know 7-10 ??

Answers

Answer:

Step-by-step explanation:

7.18/9 divide 9 and that would equal 2/1 so its 2

8.24/40 divide 8 and that would equal 3/5

9.7/21 divide 7 and that would equal 1/3

10.9/1 stays the same so its 9

7-10 is -3 because it’s basic math

Please help I’ll mark you as brainliest if correct!

A
B
C
D

Answers

Answer:

A is the answer

Step-by-step explanation:

what is 3 1/4 x 3 2/5

Answers

Step-by-step explanation:

Exact Form:

2485"

Decimal Form:

49.6"

Mixed Number Form:

4935"

The diagram shows the percentages of students who wear glasses in Lynbrook High School. If 2,500 students attend Lynbrook High School, how many students do not wear glasses?

Answers

The answer for:  The diagram shows the percentages of students who wear glasses in Lynbrook High School. If 2,500 students attend Lynbrook High School, how many students do not wear glasses?

Is 2,250 Students

Do not wear Glasses

Step-by-step explanation:


Please someone help me (NO LINKS) (NO LYING)

Answers

Number one 42 cubes .

Answer: 1 = 9. 2 = 10. 3 = 8. 4 = 12. 5 = 10. 6 = 6.

Explaintion: All you need to do is take one of the horizontal rows and one of the vertical rows and multiply then.

Each side of quadrilateral TVWX is tangent to circle Y. Find the perimeter of the quadrilateral.

Answers

9514 1404 393

Answer:

  25.6

Step-by-step explanation:

The sum of opposite sides of the circumscribing quadrilateral is half the perimeter. Here, the opposite sides TV and WX both are shown, so the perimeter is ...

  P = 2(TV +WX) = 2(4.5 +8.3) = 2(12.8) = 25.6 . . . units

The perimeter of the quadrilateral is 25.6 units.

10 + 6 • -2 = 4 • 2 + 6

Answers

Answer:

Contradiction equation or no solution

Step-by-step explanation:

10 + 6 • -2 = 4 • 2 + 6

10 - 12 = 8 + 6

-2 = 14

This is a contradiction statement

Find the total surface area of the cylinder below.

Answers

Answer:

83.54 in²

Step-by-step explanation:

Brₐinliest plz

The distance that an object falls when it is dropped is directly proportional to the
square of the amount of time since it was dropped. An object falls 288 feet in 3
seconds. Find the distance the object falls in 4 seconds,

Answers

Answer:

The object falls 384 feet in 4 seconds.

Step-by-step explanation:

This question can be solved by proportions, as the measures are directly proportional, using a rule of three.

An object falls 288 feet in 3 seconds. Find the distance the object falls in 4 seconds.

288 feet - 3 seconds

x feet - 4 seconds

Applying cross multiplication

[tex]3x = 288*4[/tex]

[tex]x = \frac{288*4}{3}[/tex]

[tex]x = 384[/tex]

The object falls 384 feet in 4 seconds.

Someone pls help (Becca’s dog walking business started with 1 dog. She walks 2 additional dogs each month.The graph represents the problem. How many dogs does she walk in the third month?)

Answers

Answer:

In the third month, Becca will be walking [tex]7[/tex] dogs

Step-by-step explanation:

The graph for the question is attached

Becca started her dog walking business with one dog

Additional dog she tries to walk every next month [tex]= 2[/tex]

The attached graph indicates that in the third month, Becca will be walking [tex]7[/tex] dogs

You make 12 equal payments. You pay a total of $1752. How much is each paymem?
HELP PLS

Answers

Answer:

$146

Step-by-step explanation:

1752/12 = 146

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