n is a positive integer
explain why n(n-1) must be an even number

Answers

Answer 1

Answer:

if 'n' is positive and odd then reducing it by one gives you an even; so then you are multiplying and even and an odd which results in an even

if 'n' is positive and even then reducing it by one gives you an odd; so then you are multiplying and even and an odd which results in an even

Step-by-step explanation:


Related Questions

12- 1/5r = 2r + 1

R=??

Answers

Answer:

r = 5

Step-by-step explanation:

12 - 1/5r = 2r + 1

12 - 0.2r = 2r + 1

12 - 0.2r + 0.2r = 2r + 0.2r + 1

12 = 2.2r + 1

12 - 1 = 2.2r + 1 - 1

2.2r = 11

2.2r ÷ 2.2 = 11 ÷ 2.2

r = 5

Answer:

r = 5

Step-by-step explanation:

12- 1/5r = 2r + 1

12 = 11/5r + 1

5(11) = (11/5r)5

55 = 11r

r = 5

Please help. Will give brainliest to correct answer.

Answers

Answer:

Step-by-step explanation:

B

Answer:

the second choice

Step-by-step explanation:

what is the difference between 3,0 and 3,-2

Answers

Answer:

if these are points on a graph, then the point (3,-2) has y-value 2 below the point at (3,0).

Step-by-step explanation:

PLSSS HELPPPP PLS need this to pass !!

Answers

the answer is the third one,
disks

A swimming pool has a diameter of 24 feet. What is the minimum amount of fabric needed to cover the pool if the cover must hang off by 1 foot all around the pool?

Answers

Answer:

531.167 ft²

Step-by-step explanation:

Given data

Dimension of pool

Diameter =24ft

Radius =12ft

If the cover must hang by 1ft around, then the diameter is 26ft

Radius =13ft

Area of cover = πr²

Substitute

Area = 3.142*13²

Area =3.143*169

Area =531.167 ft²

Hence the minimum area is 531.167 ft²

-16t^2 + 1237t - 33 pls help im short on time and need the answer

Answers

Answer:

1237t - 289

Step-by-step explanation:

Need help ASAP please and thank you

Answers

The 3rd one I think

what is the answer to this? y+4= -2(x-1)

Answers

Answer:

Hi there, this should be the correct answer!

x = -1 - 1/2y

y = -2 - 2x

Step-by-step explanation:

Work I did, hope this helps:

y + 4 = -2x + 2

y + 2x = -2

2x = -2 - y

x = -1 - 1/2y

y = -2 -2x

Hope this helped!

Find the next three terms of the sequence 80, –160, 320, –640

Answers

Answer:

100 and 330

Step-by-step explanation:

How do I find the answer?

Answers

Answer:

ans is nothing

plz its is a jock

Mutually exclusive events must be:
A) independent
B) dependent
C) intersecting

Answers

Answer: A) Independent

Step-by-step explanation:

Mutually exclusive: the two actions don't happen at the same time; they are not dependent on each other

Plzzzz helppppp again

Answers

This is the answer for you problems

Write the equation of the line that passes through the points (2,-6)and (8,−2). Put your answer in fully reduced point-slope form, unless it is a vertical or horizontal line.

please help meeee

Answers

Answer:

Step-by-step explanation:

The surface area of a cube is S(x) = 6x?, where x is the length of the side of each edge of a cube, Restrict the domain to create a one-to-one
function. Find and describe the inverse function.

Answers

Answer:

Restrict values of  x  to .  Then the surface area function is one-to-one and has an inverse.

Write  y  instead of S(x).  Interchange  x  and  y, then solve for  y.

This function could be used to find the edge of a cube with a given surface area.  For example, if the area is  x = 54, then the edge is

Step-by-step explanation:

the cost of 8 pencils in Rupees 16 find the cost of 5 pencils​

Answers

Answer:

Step-by-step explanation:

cost of 8 pencils=16

cost of 1 pencil=16/8

=Rs 2

cost of 5 pencil=5*2

=Rs 10

A chair rental company charges $100 for delivery plus $3 per chair.
You have $410 to spend on chairs. How many can you rent?

Answers

Answer:

103 chairs

Step-by-step explanation:

cost = fee + cost per chair * number of chairs

410 = 100 + 3*c

Subtract 100 from each side

410-100 = 100+3c-100

310 = 3c

Divide by 3

310/3 = 3c/3

103.3=c

We cannot rent part of a chair so we round down

103 chairs

Answer:

I think 3 chairs. (sorry, i read the equation wrong)

Step-by-step explanation:

Which of the following expressions is correctly written in scientific notation?

Answers

Answer:

The 3rd choice.

Step-by-step explanation:

The third choice has what it takes to be a scientific notation.

What are the domain and range of the function below?

Answers

Answer:

domain = 0 < x < infinity / range = y < 4

Step-by-step explanation:

what is 1,100,000,000 km/h in scientific notation?

Answers

Answer:

1100000000

Step-by-step explanation:

You have a 3L jug and a 5L jug. You need to fill the 5L jug with exactly 4L of water. Write an algorithm to solve this problem. I will award Brainliest!​

Answers

Fill the 3L jug, then pour its contents into the 5L jug.

Fill the 3L jug again, then pour as much of it (2L) as you can into the 5L jug.

Now the 5L jug is full, and the 3L jug is carrying 1L of water.

Empty the 5L jug.

Pour the 1L of water from the 3L jug to the 5L jug.

Finally, fill up the 3L jug, then transfer its water into the 5L jug. It now has 4L of water.

find the distance,(-1,2)(4,1)

Answers

Finding the area between two points

Answer:
√26
Decimal Form:
5.09901951

Answer:

2√2 I think

Step-by-step explanation:

Fhrjmfkfkjdjdkjsjjxbdhdjdiu

Answers

Answer:

-25

Step-by-step explanation:

[tex]-35[/tex] · [tex](\frac{5}{7})[/tex]

[tex]-\frac{175}{7}[/tex]        Multiply the whole number by the numerator

-25         Then simplify by dividing 175 ÷ 7

The price of an item has been reduced by 60% . The original price was $45 . What is the price of the item now?

Answers

Answer:

twenty-seven dollars

Step-by-step explanation:

0.6×$45=$27

Write an equation for the nth term of the arithmetic sequence. -6,-9,-12,-15

Answers

Answer:

[tex]a_{n}[/tex] = - 3n - 3

Step-by-step explanation:

The nth term of an arithmetic sequence is

[tex]a_{n}[/tex] = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = - 6 and d = a₂ - a₁ = - 9 - (- 6) = - 9 + 6 = - 3 , then

[tex]a_{n}[/tex] = - 6 - 3(n - 1) = - 6 - 3n + 3 = - 3n - 3

(75 points) need help as soon as possible

Answers

Answer:

2 degrees / hour

Step-by-step explanation:

The average rate of change is

f(x2) - f(x1)

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

x2 -x1

We know that x2 is 6pm so f(x2) is 101

We know that x1 is 10 am so f(x1) is 85

101 -85

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

6 pm - 10 am

16 degrees

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

8 hours

2 degrees / hour

Answer:

We have this proportion....

36 / 12 = x / 9 where x is the model door height

Cross-multiply

36*9 = 12 * x

324 = 12 *x divide both sides by 12

27 = x and that's the model height in centimeters

The admission fee to an amusement park is $27.It cost an additional p dollars to rent a locker to hold your belongings. The total cost for 2 people to enter the amusment park and each rent a locker is 64 how much does it cost for one person

Answers

Answer:

32

Step-by-step explanation:

I need the first one ASAP!

Answers

79.023 or 79 cubic inches

can someone pls pls help me?

Answers

Answer:

47yd

Step-by-step explanation:

4 + 15 + 15 + 13 = 47yd

Answer:

47 yd

Step-by-step explanation:

The perimeter is the distance around a polygon. It can be found by adding up all the lengths of the sides.

4 + 15 + 15 + 13

= 47

The GCF of 28 and 42 is _______.
A:2
B:4
C:7
D:14

Answers

the answer is D = 14

Answer:

the correct answer is 14

What is the domain of the function graphed below?

Answers

Answer:

x < 7

Step-by-step explanation:

the domain is the number range or interval of x the function is defined for to generate a y-value.

the graph shows that the y-values continue with x-values to the right up to but not including 7 (the empty dot says "excluding"). and with x- values to the left to negative infinity.

x=-1 is not a problem, because while for the left part of the function it is not included, but for the right part it is.

so, it is fully defined for all x < 7.

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