what is the principal or(postive)square root of a number N

Answers

Answer 1
The square root of number n is a number, r, that when squared equals n.
Each positive number has two square roots, a positive one and a negative one. The principal square root of a positive number is the positive square root.

For example, this of n = 4.
There are two numbers, r, that when squared equal 4.
The are 2 and -2, since 2^2 = 4 and (-2)^2 = 4.
4 has two square roots, a positive one and a negative one.
The positive square root, 2, is the principal square root of 4.

The symbol for the principal square root is the square root symbol.

[tex] \sqrt{4} [/tex]

means the principal square root of 4, which is 2.

If you mean the negative square root of 4, which is -2, then you must write a negative sign before the square root symbol.

[tex] -\sqrt{4} [/tex]

means the negative square root of 4 which is -2.


Related Questions

A salesperson earns 17% commission on her total sales. If she sold $1530 last week, how much did she earn in commission ?

Answers

So, we know the numbers:

1530 is the total sales

17% or .17, (they're the same thing) is the amount of commission she earns off of total sales (1530).

So, to find out what she earns, we multiply the two numbers together.

1530 * .17 = $260.10

If you want me to clarify or explain more, please leave a comment. Good luck!

A cruise ship is traveling at a speed of 20 knots . A knot is approximately equal to 1.151 miles per hour. What is the approximate speed the ship is traveling in yards per second ? Round to the nearest tenth.

Answers

1 mile = 1760 yards
20 * 1.151 = 23.02
23.02 * 1760 = 40,515.2
40,515.2 / 60 = 675.243~
675.243~ / 60 = 11.2542~
They are traveling 11.25 yards per second
I took the number of knots multiplied by the approximate miles per hour equal
Then multiplied that by the number of yards in a mile, and then divided that by the number of minutes in an hour, and divided that by the number of seconds in a minute. That is how I got the answer, I hope it helps!
Final answer:

The cruise ship's speed, starting at 20 knots, can be translated to approximately 11.2 yards per second when converted to miles per hour, yards, and seconds.

Explanation:

To find the cruise ship's speed in yards per second, we first need to convert knots to miles per hour by utilizing the equivalence of 1 knot to 1.151 miles per hour. Therefore, the ship is traveling approximately 20 * 1.151 = 23.02 miles per hour.

Next, we need to convert the ship's speed from miles per hour to yards per second. There are 1760 yards in a mile and 3600 seconds in an hour. The conversion will be 23.02 miles/hr * 1760 yards/mile divided by 3600 seconds/hr, which results in an approximate speed of 11.2 yards per second when rounded to the nearest tenth.

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The exterior angles of a triangle measure x + 3, 2x + 1, and 3x - 4. Find the measure of each exterior angle.
A) 18°, 31°, and 41°
B) 23°, 41°, and 56°
C) 33°, 61°, and 86°
D) 63°, 121°, and 176°

Answers

It's C



Good luck! ((((((:

Answer:

THE GOOD DAYS

Step-by-step explanation:

What is the unit rate for 768.57 m 41.1 h? Enter your answer, as a decimal, in the box.

Answers

Use the cross multiplication method. 768.57 over 41.1= x/1                                     768.57 times 1=768.57    41.1 times x=41.1x       768.57/41.1=x      x=18.7            18.7mph


Final answer:

To find the unit rate, divide 768.57 meters by 41.1 hours resulting in a unit rate of 18.70 meters per hour.

Explanation:

The question asks for the unit rate of 768.57 meters over 41.1 hours. To calculate this, divide the distance by the time:

First, write the given ratio as a fraction. 768.57 m over 41.1 h.Second, divide 768.57 by 41.1 to find the unit rate in meters per hour. 768.57 m ÷ 41.1 h = 18.70 m/h (rounded to two decimal places as per the significant figures in the original distance).

The division, 768.57 m ÷ 41.1 h, yields a unit rate of 18.70 m/h (rounded to two decimal places to match the precision of the original distance). Hence, the unit rate for this scenario is 18.70 meters per hour.

Therefore, the unit rate is 18.70 meters per hour.

alex wants to buy the same number of stamps and envelopes dancer sold in packs of 14 and envelopes are sold and packs of 10 what is the lease number of each he could buy to have the same number of stamps and envelopes

Answers

5 packs of stamps and 7 packs of envelopes. There will be a total of 70 envelopes and stamps.

Final answer:

To have the same number of stamps and envelopes, Alex would have to find the Least Common Multiple of 14 and 10, which is 70. Therefore, he should buy 5 packs of each.

Explanation:

Alex wants to buy the same number of stamps and envelopes, but they come in different pack sizes: stamps in packs of 14 and envelopes in packs of 10.

To find the least number of each he could buy to have the same number of each, we need to find the Least Common Multiple (LCM) of 14 and 10. The LCM of 14 and 10 is 70.

So, Alex would need to buy 5 packs of envelopes (since 70 divided by 10 equals 7) and 5 packs of stamps (since 70 divided by 14 equals 5) to have the same number of stamps and envelopes, which is 70 of each.

WILL GIVE BRAINLESS
factor the polynomial

Answers

Answer:

D

Step-by-step explanation:

This is factor by grouping. In factor by grouping, write a quadratic trinomil as 4 terms and group by parenthesis. Then factor by GCF in each pair. If the two parenthesis match, the factoring has worked and the factors will be the GCFs as one and the parenthesis as one other.

The factors here are the GCFs [tex]2x^2[/tex] and -3 as [tex](2x^2-3)[/tex] and the parenthesis (x-5).

Barb had $112 in her savings account. Then deposited the same amount of money into her savings account in the next 4 months. Now she has $333 in her savings account. How much money,m, did Barb deposit each month?

Answers

• Subtract first: 333 - 112 = 221

• Divide second: 221 ÷ 4(months) = 55.25

• Equation: (333 - 112) ÷ 4

Barb deposited $55.25 each month. 

Hope this helps! :D

~PutarPotato
You don't mention interest, so I'll need to assume that interest calculations are not part of the picture here.  Barb now has $333; at the beginning she had $112.  That means that over four months she deposited $221. 

That comes to $221/4 per month, or $55.25.

Every week, Mr. Kirkson uses 3 1/6 gallon of water to water every 1/3 square foot of his garden. How many gallons of water does Mr. Kirkson use per square foot to water his garden each week?

Answers

3 1/6 / 1/3 =

19/6 / 1/3 =

19/6 * 3/1 = 57/6 = 9 1/2 gallons per square foot

Answer:

Mr. Kirkson uses 9.60 gallons of water per square foot to water his garden each week.

Step-by-step explanation:

This problem can be solved by a simple rule of three.

We have that 1/3 = 0.33 square foot of his garden uses uses 3 1/6 = 19/6 = 3.167 gallons of water. How many are used per square foot? So:

1 foot - x gallons

0.33 foot - 3.167 gallons

[tex]0.33x = 3.167[/tex]

[tex]x = \frac{3.167}{0.33}[/tex]

[tex]x = 9.60[/tex]

Mr. Kirkson uses 9.60 gallons of water per square foot to water his garden each week.

(5y - 1) + (-2y + 4)

Answers

(5y - 1) + (-2y + 4)

5y -5 -2y +4 =

3y -1 

5y-1 + -2y+4

 combine like terms

5y-2y = 3y

-1+4=3

 so you have 3y+3

Show how you can use the Distributive Property to find the product of 7 and 56?

Answers

multiply 7 times 50 and 7 times 6 then add them 

ex: [(7 X 50) + (7 X 6)]

The product of 7 and 56 by using substitution method is 392.

What is Distributive property?

By the rule of distributive property, multiplying the sum of two or more addends by a number gives the same result as when each addend is multiplied individually by the number and the products are added together.

Given that;

The number are,

⇒ 7 and 56.

Now,

Find the product of 7 and 56 by using substitution method as;

⇒ 7 × 56 = 7 × (50 + 6)

              = 7 × 50 + 7 × 6

              = 350 + 42

              = 392

Thus, The product of 7 and 56 by using substitution method is 392.

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A Factory processes 1,560 ounces of olive oil per hour. the oil is packaged into 24-ounces bottles. how many bottles does the factory fill in one hour

Answers

1560 oz / 24 oz bottles = 65 bottles are filled per hr

Deshawn fuels 2 yachts and 6 barges. Each boat gets 126 gallons of fuel. To find how much fuel he needs for all the boats, deshawn first findsthe number of boats, then he uses an algorithm to multiply. Which are the three partial products deshawn could add to find the final product?

Answers

The total number of boats is given by 2 + 6 = 8

Thus, the amount of fuel he needs for all the boats is given by 8 x 126

Using place value system and extended number system, we have:

[tex]8\times126=8\times100+8\times20+8\times6 \\ \\ =800+160+48=1,008[/tex]

Therefore, the three partial products deshawn could add to find the final product are 800 + 160 + 48

In mom's car, the number of miles driven is proportinal to the number of gallons of gas used.

Answers

for number 1 the answer is 112

a number between
55

and
101

that is a multiple of

3

10

and
15

.

Answers

60

3 x 20 = 60
10 x 6 = 60
15 x 4 = 60
60

60/3=30
60/15=4
60/10=6

Jenny read 3 books in 7.5 hours. At this rate, how many books can Jenny read in one hour?

Answers

We are given that Jenny can read 3 books in 7.5 hours. To find the number of books Jenny can read in one hour, all we need to do is divide 3 by 7.5, which gives us 0.4 books. Therefore, Jenny can ready 0.4, or 2/5 of a book in one hour. Hope this helped!
Hi there! To find the unit rate for the number of books Jenny reads, we can divide the number of books read by the amount of hours. 3/7.5 is 0.4 or 4/10 in fraction form. Jenny can read 4/10 of a book in one hour.

Checking account A charges a monthly service fee of $25 and a wire transfer fee of $6.50 each, while checking account B charges a monthly service fee of $16 and a wire transfer fee of $8.50 each. Which checking account is the better deal if 4 wire transfers are made per month?

Answers

I'm pretty sure the answer is checking account A. Hope this helps
Account B. This is because if you multiply 8.50 (the fee) by 4 (how many times you are going to use it) then add that product by 16, you get 50 dollars a month. Account A was 51 dollars a month.

The mechanic does 4 oil changes in 2 hours. How many oil changes can the mechanic do in 8 hours?

Answers

16 Oil changes.
4oil changes/2 hours= 2 oil changes per hour.

2 oil changes per hour * 8 hours = 16 oil changes.

Answer:it will be 2

Step-by-step explanation:because you multiply it23457

Write an expression for the calculation 4 times the difference of 10 and 8 minus 3

Answers

An expression for the calculation '4 times the difference of 10 and 8 minus 3' is written as[tex]4 imes (10 - 8) - 3.[/tex]When evaluated, this expression results in the value of 5.

To write an expression for the calculation 4 times the difference of 10 and 8 minus 3, you need to apply the order of operations, also known as PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).

The difference of 10 and 8 is calculated first, which is 10 - 8. This equals 2. Then, you need to multiply this difference by 4, resulting in [tex]4 imes 2.[/tex] Finally, subtract 3 from that product to find the value of the entire expression. So, the expression is

To evaluate this expression, first calculate the difference inside the parentheses (10 - 8 = 2), then multiply by 4 ([tex]4 imes[/tex]2 = 8), and finally subtract 3 (8 - 3 = 5). So, the expression evaluates to 5.

A package states that there are 60 calories in 12 crackers and 75 calories in 15 crackers. Since the relationship is proportional, how many calories are there in 180 crackers?
x | y
12 60
15 75




A. 36 calories
B. 108 calories
C. 720 calories
D. 900 calories

Answers

60/12 = 5

75/15 = 5

 there are 5 calories per cracker


180 * 5 = 900 calories in 180 crackers

 Answer is D

Make x/180, showing that there are 180 crackers with an unknown amount of calories. Cross multiply 60 and 180, which is 10,800. Divide 10,800 by 12, and you get 900.

A hospital discards 1000 patient gowns every 3 months how many gallons will they need to replace the discarded ones over the next year

Answers

keeping in mind that, well, first off, they're not getting any gallons of gowns btw, anyway.... how many gowns will they need for a year?   well, depends on how many they discarded in a year.  Now, a year has 12 months, and we know they discard 1000 in 3 months, thus

[tex]\bf \begin{array}{ccll} gowns&months\\ \text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\ 1000&3\\ g&12 \end{array}\implies \cfrac{1000}{g}=\cfrac{3}{12}\implies \cfrac{1000}{g}=\cfrac{1}{4}\implies 4000=g[/tex]

To which set(s) does 12/3 belong? Choose all that apply. A.Counting/Natural Numbers B.Whole Numbers C.Integers D.Rational Numbers E.Irrational Numbers F.Real Numbers

Answers

I think it might be A and D but I'm not sure. Hope this helped, have a great day! :D
Final answer:

The number 12/3 belongs to the sets of Whole Numbers, Integers, and Rational Numbers.

Explanation:

The number 12/3 belongs to the following sets: Whole Numbers, Integers, and Rational Numbers.



A whole number is an integer that is greater than or equal to zero. Since 12/3 = 4, which is a positive integer, it belongs to the set of Whole Numbers.



An integer is any positive or negative whole number, including zero. Since 12/3 = 4, it is a positive integer and belongs to the set of Integers.



A rational number is any number that can be expressed as a fraction. Since 12/3 can be simplified to 4, it is a rational number.

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Find the points of intersection of the line x = 3 + 2t, y = 7 + 8t, z = −2 + t, that is, l(t) = (3 + 2t, 7 + 8t, −2 + t), with the coordinate planes.

Answers

This is not possible in two dimensions, you would need a 3 dimensional  graphing calculator.

The diameter of a circle is 8 inches. What is the area?
A. 8pi in ^2
B. 16pi in ^2
C. 32pi in ^2
D. 64pi in ^2

Answers

A = 1/4 * (pi) * d^2
A = 1/4 * (pi) * 8^2
A = 1/4 * (pi) * 64
A = 1/4(64) * (pi)
A = 64/4 * (pi)
A = 16 (pi) in^2
i believe your answer is
B. 16pi in ^2
i could be wrong though 
hope it helps!

Find two numbers with a sum of 20 and a difference of 14.

Answers

the answers are 17 and 3

17 - 3 = 14
17 + 3 = 20

What expression is equivalent to 3y - 21? A. 3(y - 21) , B. 3(3y - 21) , C. 3(3y - 7) , D. 3(y - 7) . Need help quickly! Thanks <3

Answers

It's D, 3(y-7) because that would be 3*y - 3*7 which is 3y-21. Hope this helped!
D. 3(y-7)= 3y-21 
  = 3y-21= 3y-21

The sides of a triangle measure 64 mm, 3 CM, and 7 CM. What is the total leangth of the two longer sides?

Answers

7 cm = 70 mm so 64 mm+70mm= 134mm

HELP ASAP 20 An online media service offers video and music downloads. Each download of a song costs $1. Each download of a video costs 6 times as much as the song download. You have a credit of $60. How many songs can you purchase after buying 7 videos?

Answers

EIGHTEEN SONGS AT A DOLLAR EACH. SEVEN VIDEOS AT SIX BUCKS EACH IS FORTY-TWO DOLLARS. together they equal $60


each song (s) download costs $ 1
each video (v) cost 6 times as much as a song.....so each video costs (6 * 1) = $ 6

u have a credit of $ 60 and u have already purchased 7 videos...

s + 6v = 60.....and v = 7 because he purchased 7 videos
s + 6(7) = 60
s + 42 = 60
s = 60 - 42
s = 18 <== he purchased 18 songs


The table shows the number of miles driven over time time 4,6,8,10 distance 232, 348, 464, 580
Express the relationship between distance and time and simplified form as a unit rate. Determine which statement correctly interprets this relationship

Answers

The distance covered per hour are as follows:
4 to 6: 348 - 232 = 116 ÷ 2 hours = 58
6 to 8: 464 - 348 = 116 ÷ 2 hours = 58
8 to 10: 580 - 464 = 116 ÷ 2 hours = 58.

We see that the vehicle covers 58 miles every hour. Therefore, the relationship between distance and time is 58 miles per hour. Written as an expression:
distance = 58miles/hour,
or
d = 58t
where d is distance in miles and t is time

Final answer:

The relationship between distance and time is that the vehicle travels at a constant speed of 58 miles per hour, meaning for every hour of driving, the distance covered is 58 miles.

Explanation:

To express the relationship between distance and time in simplified form as a unit rate, we divide the distance by the time for every given value. Based on the provided data, for each time interval, the distance driven is 58 times the number of hours.

Therefore, the unit rate or speed is 58 miles per hour. This can be explained by the fact that at each time interval, the distance increases by 116 miles every 2 hours, which simplifies down to 58 miles per hour (58 miles/1 hour).

To interpret this, one could say that for every hour of driving, the vehicle covers a distance of 58 miles. Thus, speed or velocity is the constant rate at which distance is covered over time in this scenario.

Solve. Evaluate roots and round to the nearest tenth. (Enter your answers as a comma-separated list. Simplify your answers completely.) 9x2 − 18 = 0

Answers

x = 1,

9(1) = 9,
9(2) = 18,
18 - 18 = 0. 

Which operation is NOT closed for polynomials ?

Answers

Dividing two binomials will not always result in a polynomial. For instance, divide (x+2) over (x+3) and we won't get a polynomial. The result is known to be a rational expression but not a polynomial. So that's why division is not closed for polynomials.

Contrast that with addition, subtraction and multiplication. For any of those operations taking two polynomials and adding them, subtracting them, or multiplying them will lead to another polynomial. That's why these operations are closed for polynomials.

Answer: Choice B

The operation that is not closed for polynomial is [tex]\boxed{{\text{Dividing binomials}}}.[/tex] Option (B) is correct.

Further explanation:

Given:

The given options are as follows,

(A). Adding binomials

(B). Dividing binomials

(C). Subtracting binomials

(D). Multiplying binomials

Explanation:

Consider the two polynomials [tex]x + 1[/tex] and [tex]2x + 4.[/tex]

Add the two polynomials [tex]x + 1[/tex] and [tex]2x + 4.[/tex]

[tex]\begin{aligned}{\text{Add}} &= x + 1 + 2x + 4\\&= 3x + 5\\\end{aligned}[/tex]

The result after adding is a polynomial. Therefore, adding binomials is a closed for polynomials.

After dividing the two polynomials [tex]x + 1[/tex] and [tex]2x + 4[/tex] the result is a rational expression.

Therefore, dividing binomials operation is not closed for polynomials.

Subtract the two polynomials [tex]x + 1[/tex] and [tex]2x + 4.[/tex]

[tex]\begin{aligned}{\text{Subtract}}&= 2x + 4 - \left( {x + 1}\right)\\&=x + 3\\\end{aligned}[/tex]

The result after subtracting is a polynomial. Therefore, subtracting binomials is a closed for polynomials.

Multiplying the two polynomials [tex]x + 1[/tex] and [tex]2x + 4.[/tex]

[tex]\begin{aligned}{\text{Multiplying}}&= \left( {2x + 4} \right)\times \left( {x + 1} \right)\\&= 2{x^2} + 2x + 4x + 4\\&= 2{x^2} + 6x + 4\\\end{aligned}[/tex]

The result after subtracting is a polynomial. Therefore, multiplying binomials is a closed for polynomials.

The operation that is not closed for polynomial is [tex]\boxed{{\text{Dividing binomials}}}.[/tex] Option (B) is correct.

Option (A) is not correct as the adding binomials operation is closed for polynomials.

Option (B) is correct as the dividing binomials operation is not closed for polynomials.

Option (C) is not correct as the adding binomials operation is closed for polynomials.

Option (D) is not correct as the adding binomials operation is closed for polynomials.

Learn more:

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Answer details:

Grade: High School

Subject: Mathematics

Chapter: Polynomials

Keywords: polynomials, function, dividing, subtracting, adding, multiplying, binomials, closed for binomials.

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