Urgent help … If you know,Please help me ☹️☹️☹️

Graph a line that is perpendicular to the given line. Determine the slope of the given
line and the one you graphed in simplest form. Click and drag on the graph to draw a
line.

Urgent Help If You Know,Please Help Me Graph A Line That Is Perpendicular To The Given Line. Determine

Answers

Answer 1

Answer:

y=2/3

Step-by-step explanation:

Find two points on the line and find the slope.

1,-3 -1,1

y1-y2/x1-x2

-3-1/1--1

-3/2

Then find the reciprocal of this slope by flipping the numerator and the denominator, changing the sign from positive to negative and visa versa.


Related Questions

Help
Construct a problem that is written in exponent form then explain the steps to converting a problem from exponent to radical form.

Answers

Step-by-step explanation:

Radicals and fractional exponents are alternate ways of expressing the same thing. ... These examples help us model a relationship between radicals and rational ... Problem. Write as an expression with a rational exponent. The radical form can be ... Change the expression with the rational exponent back to radical form.  

What do the a b and c stand for in the pythagorean theorem?

Answers

a and b are the legs, and c is the hypotenuse.
hope this helps!

Answer:

A, B, and C are labeled for each side of a right triangle.

Step-by-step explanation:

A and B are used to label the legs while C is used to label the hypotenuse(AKA the long side of a right triangle and the side opposite of the 90° angle.) The B side is the opposite side of the hypotenuse or the side C. The A is the bottom leg that is in between sides B and C.

The top of a pie container is a circle. The radius of the pie is 8 inches and the radius of the container is 9 inches. What is the difference between the circumference of the container and the circumference of the pie in inches to the nearest tenth?
A : 3.1 inches
B 6.3 inches
C: 12.6 inches
D 25.1 inches
E 50.2 inches

Answers

Answer:

B. 6.3 inches.

Step-by-step explanation:

I'll use 2πr for both sides of this.

Pie:

2 * 3.14 * 8

16 * 3.14

50.24 inches for the pie

Container:

2 * 3.14 * 9

18 * 3.14

56.52 inches for the container

Difference:

56.52 - 50.24

6.28-inch difference, which rounds to 6.3 inches. B is our answer.

E
1)
AC = 9 cm
AB = 3 cm
DE = 20 cm
Angle ABC = angle CBD= angle BDE = 90°
20 cm
9 cm
Calculate the length of CD.
Give your answer to 3 significant figures.
50°
А
D
→B
3 cm

Please could you could give me a step by step.

Answers

Answer:

Step-by-step explanation:

We can use Hypotenuse Theorem for this:

For triangle ABC,

AC²=CB²+BA²

9²=CB²+3²

Switch the sides

-CB²=3² -9²

-CB²= 9-81

-CB²= -72

the signs cut each other

CB²=72

the square changes sides

CB=√72

CB= 8.49 cm

Now triangle CBD

We have the length of CB but not the other two whereas we have the angle

It will be sin

As we know sin= O/H

Here O is CB whereas H is CD

Put the values

sin 50= 8.49/H

H= 8.49 ÷sin 50

Calculate

H=11.1 cm

As we know H is CD so CD is 11.1 cm

Hope it helps

Enter the correct letter to match each summation expression with the property or formula.

n
Σ
i=1
cai is equal to
. a
n(n + 1)(2n + 1)
6

n
Σ
i=1
i is equal to
. b
n(n + 1)
2

n
Σ
i=1
c is equal to
. c c
n
Σ
i=1
ai

n
Σ
i=1
i3 is equal to
. d cn

n
Σ
i=1
i2 is equal to
. e
n(n + 1)
2
2

Answers

The correct letter that match each summation expression are;

[tex]\displaystyle \sum\limits_{i=1}^n[/tex] is equal to c

[tex]\displaystyle {\sum\limits_{i=1}^n i}[/tex] is equal to b

[tex]\displaystyle \sum_{i=1}^n c[/tex] is equal to d

[tex]\displaystyle\sum_{i=1}^n i^3[/tex] is equal to e

[tex]\displaystyle \sum\limits_{i=1}^n i^2[/tex]is equal to a

What is those the summation expression indicates?

The summation expression indicates the sum of all values of a series of a function within a specified limit of values.

The equation for the sum of a constant c and the ith term of an of a sequence of numbers is equivalent to the product of the constant and the sum of the terms of the sequence as follows;

[tex]\sum\limits_{i=1} ^n {c\cdot a_i} = c\cdot \sum\limits_{i=1} ^n {a_i}[/tex] the correct option is c

The sum of ith terms from i = 1 to i = n is an arithmetic series with the formula;

Sₙ = (n/2)·[2·a + (n - 1)·d]

Where; a = The first term = 1

d = The common difference = 1

Therefore;

Sₙ = (n/2)·[2 + (n - 1)] = n + n·(n - 1)/2 = (2·n + n² - n)/2

(2·n + n² - n)/2 = (n² + n)/2 = n·(n + 1)/2

Therefore;

[tex]\sum\limits_{i=1}^n i = \dfrac{n\cdot (n + 1)}{2}[/tex] The correct option is b

The sum of n number of a constant, c is c·n, therefore;

[tex]\sum\limits_{i = 1}^n c = c\cdot n[/tex] The correct option is d

[tex]\sum\limits_{i=1}^n [(1 + i)^3-i^3[/tex] = (2³ - 1³) + (3³ - 2³) + ... + ((n + 1)³ - n³) = (n + 1)³ - 1³

(n + 1)³ - 1³ = n³ + 3·n² + 3·n

[tex]\sum\limits_{i=1}^n [(1 + i)^3-i^3[/tex] = n³ + 3·n² + 3·n

However, we get;'

[tex]\sum\limits_{i=1}^n [(1 + i)^3-i^3[/tex] = [tex]\sum\limits_{i=1}^n [ i^3 + 3\cdot i^2 + 3\cdot i+ 1-i^3][/tex]

[tex]\sum\limits_{i=1}^n [ i^3 + 3\cdot i^2 + 3\cdot i+ 1-i^3][/tex] = [tex]\sum\limits_{i=1}^n [ 3\cdot i^2 + 3\cdot i+ 1][/tex] = 3·S₂ + 3·S₁ + n

Where;

[tex]S_2 = \sum\limits_{i=1}^n i^2[/tex]

[tex]S_1 = \sum\limits_{i=1}^n i[/tex] = n·(n + 1)/2

[tex]\sum\limits_{i=1}^n [ 3\cdot i^2 + 3\cdot i+ 1][/tex] = n³ + 3·n² + 3·n = 3·S₂ + 3·S₁ + n

3·S₂ = n³ + 3·n² + 3·n - (3·S₁ + n) = n³ + 3·n² + 3·n - (3·(n·(n + 1)/2) + n)

n³ + 3·n² + 3·n - (3·(n·(n + 1)/2) + n) = n³ + 3·n²/2 + n/2

3·S₂ = n³ + 3·n²/2 + n/2

S₂ = n³/3 + 3·n²/6 + n/6 = (2·n³ + 3·n² + n)/6

S₂ = (2·n³ + 3·n² + n)/6 = n·(2·n² + 3·n + 1)/6

S₂ = n·(2·n² + 3·n + 1)/6 = n·(2·n + 1)·(n + 1)/6

S₂ = n·(2·n + 1)·(n + 1)/6

[tex]S_2 = \sum\limits_{i=1}^n i^2 = \dfrac{n\cdot (2\cdot n + 1)\cdot (n + 1)}{6}[/tex] The correct option is; a

(n + 1)⁴ - n⁴ = 4·n³ + 6·n² + 4·n + 1

Therefore;

(n + 1)⁴ - 1⁴ = 4·S₃ + 6·S₂ + 4·S₁ + n

4·S₃ = (n + 1)⁴ - 1⁴ - (6·S₂ + 4·S₁ + n)

(n + 1)⁴ - 1⁴- (6·(n·(2·n + 1)·(n + 2)/6) + 4·(n·(n + 1)/2) + n) = (n + 1)·(3·n² - n + 1)

4·S₃ = n²·(n + 1)²

S₃ = n²·(n + 1)²/4

[tex]S_3 = \sum\limits_{i=1}^n i^3 = \dfrac{n^2\cdot (n+1)^2}{4}[/tex] The correct option is e

Learn more about the sum of a series of values here: https://brainly.com/question/28586583

#SPJ1

Help if you can!! I really need some good grades or I will fail on this and that wont help anything.

Answers

Answer:   6  1/8

Step-by-step explanation:

Each x on the line represents one piece of string that long. For example, since there is one x at 1/8, she cut one piece of string 1/8 ft long. So you take all the values and add them up:

1/8+2/4+2/4+2/4+2/4+5/8+3/4+3/4+7/8

then find a common denominator (so make everything over 8)

1/8+4/8+4/8+4/8+4/8+5/8+6/8+6/8+7/8    =      41/8

when you divide this, you will get 5 1/8

since theoriginal problem says she still has 1 foot leftover, you add one to get the total value when she started.

So, Emma had 6 1/8 ft string originally

What is 562,148,900 in expanded form

Answers

Answer:

562,148,900 =

500,000,000

+ 60,000,000

+ 2,000,000

+ 100,000

+ 40,000

+ 8,000

+ 900

+ 0

+ 0

Answer:

Hello!

First we need to understand what expanded form is!

Expanded form is a way of writing a number to see the value of each digit. An example is:

111

100 + 10 + 1 = 111

So we must find the value of 562,148,900, in expanded form.

First we would find the first digit, and separate it from the other digits.

5

Then, we would count the digits behind that, and add it to the right of the five, in the form of zeroes.

500,000,000

We would continue this process for each digit, and then we would put them in addition form.

Your final answer would be,

 500,000,000  

60,000,000  +

2,000,000  +

100,000          +

40,000          +

8,000          +

900                  +

0                  +

0                  +

__________________________

             562,148,900

waffletowne

This is due at 11:59 tonight please help meh and explain your reasoning ( •᷄ - •᷅ )​

Answers

Answer:

44.375sq.cm

Step-by-step explanation:

The Area of the figure = Area of the square - Area of the quadrant

Area of the square = 8 * 8 = 64sq. cm

Area of the quadrant = πr²/4 = 3.14(5)²/4

Area of the quadrant = 19.625sq.cm

Area of the figure = 64 - 19.625

Area of the figure  = 44.375sq.cm

Which figure will result from this net?

Answers

Pentagonal prism.

The shape will have bases that are pentagons.

When x = 2 and y = 10 Write a formula for in terms of .

Answers

Answer:

y=mx-c

Step-by-step explanation:

follow to explain

PLEASE HELP I WILL CHOOSE BRAINLIEST!

Answers

Answer:

x=9

Step-by-step explanation:

Use the triangle Similarity theorem. First, make a proportion.

--------------------------------------------------------------------------------------------

21 / 77 is equal to 30 / 11x + 11         then solve.

Step 1: Cross-multiply.

21*(11x+11)=(30)*(77)

231x+231=2310

Step 2: Subtract 231 from both sides.

231x+231−231=2310−231

231x=2079

x=9

HOPE THIS HELPS!

Which of the following properties can be used to show that the expression 4^5/3 is equivalent to 3 square root 4^5

Answers

Answer:B

Step-by-step explanation:

The number of students in a school fell from 700 last year to 646 this year. What is the percentage reduction?

Answers

Answer: 7.71%

Step-by-step explanation:

Number of students in a school last year = 700

Number of students in a school this year = 646

Reduction in the number of students = 700 - 646 = 54

The percentage reduction will be:

= Reduction in number / Last year students × 100

= (54 / 700) × 100

= 7.71%

Can someone help me?

Answers

9514 1404 393

Answer:

  (0, 1)

Step-by-step explanation:

The y-intercept is where the graph crosses the y-axis. The x-coordinate is always 0 there. Here, the y-coordinate is 1 grid square up from the x-axis, so the coordinates of the y-intercept are (0, 1).

A cylindrical metal pipe has a diameter of 8.4 millimeters and a height of 10 millimeters. A hole cut out of the center has a diameter of 6 millimeters. A smaller cylinder is cut out of a larger cylinder. The smaller cylinder has a diameter of 6 millimeters. The larger cylinder has a diameter of 8.4 millimeters. Both cylinders have a height of 10 millimeters. What is the volume of metal in the pipe? Use 3.14 for and round the answer to the nearest tenth of a cubic millimeter. 282.6 mm3 271.3 mm3 553.9 mm3 836.5 mm3

Answers

Answer:

its b

Step-by-step explanation:

got it right on edge

The volume of the metal in the cylinderical pipe given the dimensions of the larger and smaller cylinders is 271.30 mm³.

What is the volume of the cylinder?

A cylinder is a three-dimensional object. It is a prism with a circular base.

Volume of a cylinder = nr^2h

Where:

n = 22/7 r = radius = diameter / 2

The volume of the metal in the cylinderical pipe = 3.14 x 10 x [(8.4/2)² - 6/2)²] = 271.30 mm³

To learn more about to determine the volume of a cylinder, check: https://brainly.com/question/9624219

#SPJ2

can someones please help me i dont get this

Answers

Answer:

176.25in^2

Step-by-step explanation:

You can tell that the two triangles on the left, and the two triangles on the right make a rectangle if you flip one of them. Because of this, you can multiply the base and height to get the area of both.

7.5*16=120 (left side)

7.5*7.5=56.25 (right side)

Now we add them to get the full area:

120+56.25=176.25in^2

29 , 58 , 116 , 7th term

Answers

Answer:

The 7th term is 1856.

Step-by-step explanation:

The equation of this is n * 2 for the next of every variable. So with this knowledge,

first term = 29

Multiply by 2.

second term = 58

Multiply by 2.

third term = 116

Multiply by 2.

fourth term = 232

Multiply by 2.

fifth term = 464

Multiply by 2.

sixth term = 928

Multiply by 2.

seventh term = 1856.

Triangle ABC is similar to Triangle DEF. Use the similar triangles to
answer the questions. (The triangles are not to scale.)
(In pic)
a.) Find the length of the BC and DF.
b.) Find the perimeter of each triangle

please help ! thanks :)

Answers

Answer:

Below in bold.

Step-by-step explanation:

As they are similar corresponding sides are in the same proportion so

3/2 = BC/3

2BC = 3*3

2BC = 9

BC = 4.5.

3/2 = 5/DF

3DF = 2*5

DF = 2*5 / 3

= 3.33...

Perimeter of ABC = 3 + 4.5 + 5 = 12.5.

Perimeter of DEF =  2 + 3 + 3.33.. = 8.33...

Answer:

BC = 4.5 cm

DF = 10/3 cm

Step-by-step explanation:

Corresponding sides of similar triangles are in same ratio

[tex]\frac{BC}{EF}=\frac{AB}{DE}\\\\\frac{BC}{3} =\frac{3}{2}\\\\BC = \frac{3}{2}*3\\\\BC = \frac{9}{2}\\\\BC = 4.5 cm[/tex]

[tex]\frac{DF}{AC}=\frac{DE}{AB}\\\\\frac{DF}{5}=\frac{2}{3}\\\\DF = \frac{2}{3}*5\\\\DF = \frac{10}{3}[/tex]

Perimeter of ΔABC = 3 + 5 +4.5 = 12.5cm

Perimeter of ΔDEF = 2 + 3 + 3.3 = 8.3 cm

Dr. Seals borrows $15,000 to remodel her backyard. The interest rate is 3%. The interest is compounded twice a year for two years. How much is the total she pays? How much is the interest?

Answers

Answer:

$1688.26

interest= $188.26

Step-by-step explanation:

188.26 is the answer

Four buses were filled with children and 20 children rode in cars for a field trip. If each bus can hold 58 children, how many went on the field trip?

Answers

The correct answer to your question is 252 children

Slope from graph Khan academy :
What is the slope of this line?

Answers

Answer:

[tex]slope=-3[/tex]

Step-by-step explanation:

[tex]m=\frac{change(y)}{change(x)}[/tex]

Use two points,

(-1,0)(0,-3)

[tex]m=\frac{0-(-3)}{-1-0}[/tex]

[tex]m=\frac{3}{-1}[/tex]

[tex]m=-3[/tex]

Answer:

-3

Step-by-step explanation:

76 cm a 52 cm Find the area of the regular pentagon (the answer has one digit after the decimal point)​

Answers

Answer:

98.8 cm²

Step-by-step explanation:

Hi there!

[tex]A=\frac{1}{2} Pa[/tex] where P is the perimeter of the pentagon and a is the apothem (the line going from the center of the pentagon one edge)

1) Find the perimeter

[tex]P=5l[/tex] where l is the side length

Plug in the side length 7.6 cm

[tex]P=5(7.6)\\P=38[/tex]

Therefore, the perimeter of the pentagon is 38 cm.

2) Find the area

[tex]A=\frac{1}{2} Pa[/tex]

Plug in the perimeter (38) and the apothem (5.2)

[tex]A=\frac{1}{2} (38)(5.2)\\A=\frac{1}{2} (38)(5.2)\\A=\frac{1}{2} (197.6)\\A=98.8[/tex]

Therefore, the area of the pentagon is 98.8 cm².

I hope this helps!

The rectangular prisim below has a total surface area of 158 in use the net to determine the missing dimension

Answers

Answer:

The problem seems to be incomplete, after an online search I couldn't find the complete question, to be able to solve the question, I will assume that the known measure is the width W.

For a rectangular prism of length L and width W, the surface area is calculated as:

S = W*L

For the assumption we took, we have:

W = 39.5ft

And we also know that S = 158 ft^2

And we want to find the missing dimension, in this case is L, then we need to solve:

158 ft^2 = W*L

We just need to divide both sides by the known measure, W

We get:

(158 ft^2)/W = L

So you just need to replace the known value, and can find the missing one.

HELP ME PLEASE! THE ATTACHMENT HAS THE INFO.
THANK YOU!

Answers

Answer:

The answer is B

Step-by-step explanation: yo mum u dont need one

Answer:

Your answer is b

Step-by-step explanation:

Step-by-step explanation: None

Can someone really help me!

Answers

Answer:

Step-by-step explanation:

 3x - (3x) - 2 = 3x + 3x - 2    {Combine like terms}

                       = 6x - 2    

I-100I + 3x - [-4x] = 100 + 3x + 4x

                            = 100 + 7x

I -100 I  means absolute value of 100 = 100

answer for brainilest and 11 points

Answers

Answer:

[tex]16 \times 10 = 160 {in}^{2} \\ 160 \div 16 = 10 {ft}^{2} [/tex]

so you have to find what the 10x26 inches are then divide by 4

Please show the answer with the work, GodBless.

Answers

well, we know that y=1/2x+5 from the first equation. if we substitute that into the second equation, it becomes 2x + 1/2x +5 =1. solve for x. 2x+1/2x= -4, 2 1/2x=-4, x=-1.6. plug that in to one of the equations. 2(-1.6)+y=1, -3.2+y=1, y=-2.2. the solution is (-1.6, -2.2)

Which equation models a proportional relationship with the unit rate of 3?

Y = 3

Y = 3x

Y = x+3

Y = 3x + 3

Answers

y=3x please mark as brainliest:)

helppp please, i don’t know how to do this

Answers

Answer:

Line CB

Step-by-step explanation:

We know the smallest triangle is the left triangle, so you need to find the smallest angle in that triangle, which is 50 degrees as shown, and the opposite side to that, CB, is the smallest side.

Select all of the correct classifications for this triangle. There may be more than 1!)
O Scalene
Equilateral
Right
Isosceles

Answers

Answer:

Just right and Isosceles

Step-by-step explanation:

Answer:

It is Right angled and Isosceles triangle

Other Questions
What is the volume of the rectangular prism shown.What is the surface area of the rectangular prism Prove triangle ADE is congruent to triangle CBE. Question 7 3 points)What is interest? (3 points)aA type of credit that does not require a depositObA type of loan for purchasing a homeocThe rate paid for the use of creditOoThe rate paid for a good or service write the fraction as a product of a whole number and a unit fraction 5/5 How many 3/8 mile laps does shandra need to run to complete 6 miles? Find the value of X................................................................... ANSWER NO LINKS I WILL REPORT Which statement is true? A gas has a pressure of 50.0 mm Hg at 540 K. What is the pressure at 200.0 K if there is no volume change? *17.0 mmHg18.5 mmHg19 mmHg22.5 mmHg Mary bought a bag of parsnips that weighed 2 1/4 pounds. She also bought a bag of turnips that weighed 3 times as much as the parsnips. How many pounds of turnips did Mary buy? La ______ ________ de un medio se conforma con la eleccin y presentacin de las noticias, as como la manera de analizarlas y su ubicacin Select the correct text in the passage. Which sentence in this excerpt shows that Tom Canty is not satisfied with being a mock (pretend) prince?The Prince and the Pauper by Mark Twain (excerpt)By-and-by Tom's reading and dreaming about princely life wrought such a strong effect upon him that he began to act the prince, unconsciously. His speech and manners became curiously ceremonious and courtly, to the vast admiration and amusement of his intimates. [But Tom's influence among these young people began to grow now, day by day; and in time he came to be looked up to, by them, with a sort of wondering awe, as a superior being.] He seemed to know so much! and he could do and say such marvelous things! and withal, he was so deep and wise! Tom's remarks, and Tom's performances, were reported by the boys to their elders; and these, also, presently began to discuss Tom Canty, and to regard him as a most gifted and extraordinary creature. Full-grown people brought their perplexities to Tom for solution, and were often astonished at the wit and wisdom of his decisions, [In fact he was become a hero to all who knew him except his own family---these, only, saw nothing in him.]Privately, after a while, Tom organized a royal court! He was the prince; his special comrades were guards, chamberlains, equerries, lords, and ladies in waiting, and the royal family. Daily the mock prince was received with elaborate ceremonials borrowed by Tom from his romantic readings; daily the great affairs of the mimic kingdom were discussed in the royal council, and daily his mimic highness issued decrees to his imaginary armies, navies, and vice royalties.After which, he would go forth in his rage and beg a few farthings, eat his poor crust, take his customary cuffs and abuse, and then stretch himself upon his handful of foul straw, and resume his empty grandeur's in his dreams. [And still his desire to look just once upon a real prince, in the flesh, grew upon him, day by day, and week by week, until at last it absorbed all other desires, and become the one passion of his life.]One January day, on his usual begging tour, he tramped despondently up and down the region round about Mincing Lane and Little East Cheap, hour after hour, bare-footed and cold, looking in at cook-shop windows and longing for the dreadful pork-pies and other deadly inventions displayed there---for to him these were dainties fit for the angels; that is, judging by the smell, they were---for it had never been is good luck to own and eat one. There was a cold drizzle of rain; the atmosphere was murky; it was melancholy day. At night Tom reached home so wet and tired and hungry that it was not possible for his grandfather and grandmother to observer his forlorn condition and not be moved---after their fashion; wherefore they gave him a brisk-cuffing at once and sent him to bed. [For a long time his pain and hunger, and the swearing and fighting going on in the building, kept him awake; but at last his thoughts drifted away to far, romantic lands, and he fell asleep in the company of jeweled and gilded prince-lings who live in vast palaces, and had servants salaaming before them or flying to execute their orders. And then, as usual, he dreamed that he was a prince-ling himself.]Answer choices are in the brackets [ ]. Mai poured 2.6 liters of water into a partially Field pitcher. The pitcher then contained 10.4 liters what is the solution of the equation mean in the situation How did scientists figure out how old the rocks in the Mid-Atlantic Ridge are? A. Radiometric datingB. Taking photographsC. Watching it growD. Asking other people 30 POINTS - PICKING BRAINLIEST ANSWERSelect the correct button in the table to show whether each characteristic describes slaves working in the fields, in the planters home, or at skilled jobs.* could sell their services to other people* had to serve the planters family 24 hours a day* allowed to keep a portion of money earned* worked on the same task at the same time as everyone else* could earn enough money to buy their freedom* often had better food, clothing, and shelter This is a whatA human b alien C mammal D all the above. PLZZZZZZZZZZZZZZZZZZZZZZZ HHHHHHHHEEEEELLLPPPPP Read the sentence.When it comes to making pottery, my class is full of true artisans.Which choice is the best synonym for the word artisans?craftspeoplenovicespottersamateurs What can civilization do about the instinct toward evil, according to the novel? Question 7 options: Civilization can completely eradicate the impulse toward evil Civilization is powerless to control our impulses Civilization exacerbates our evil instincts Civilization can help control our savage impulses Determine the two numbers between which 2 lies. A. 1.4 and 1.5 B. 1.2 and 1.3 C. 1.3 and 1.4 D. 1.5 and 1.6 Comm 101 helpQuestion:What fallacy is most clearly being described?One manager explained to Tom that The last person with this job tried everyone to work more by scaring them, he used to tell them, Management is furious at your performance or Executive management is going to hate that for no reason at all.Possible Answers:A. Straw manB. Appeal to traditionC. False CauseD.Red HerringE. Ad HominemF. Hasty GeneralizationG. False equivalenceH. Circular Reasoning