1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Rudik [331]
3 years ago
10

How do you know if a square root of something is rational or irrational? like i know it can be represented by a fraction or a ra

tio of two integers but like how would √17 be irrational? Please explain
Mathematics
1 answer:
ra1l [238]3 years ago
5 0
The square root of a whole number will be rational if the whole number is a perfect square (i.e 1, 4, 9, 16, 25, 36, 49, 64, 81, 100, 121, 144 etc) and irrational otherwise.

Rational number is a number that can be described as m/n 

so a fraction can be a rational number, 0.8=4/5 
Irrational numbers can't be written as a fraction 

The part about the number having to be a perfect square is still correct, if it's not a prefect square than it will just keep going(a decimal that never ends) 

for example the square root of 0.64 is 0.8 
and the square root of 10 is 3.162277... 
as you can see the 0.64 one ends and is rational, whereas the 10 one just keeps going and is irrational.
You might be interested in
Factor the expression. K^2+kf-2f^2
evablogger [386]

Answer:

cant factor something that is not like terms its the same answer

Step-by-step explanation:

4 0
2 years ago
When 10 b = 5 (StartRoot c EndRoot + 2) is solved for c, one equation is c = (2b minus 2) squared Which of the following is an e
Burka [1]

Answer:

I will show all the steps to lead to the solution.

1) 10b = 5 (√c + 2)  <---- starting equation

2) divide by 5 => 2 b = √c + 2

3) subtract 2 => 2b - 2 = √c

4) raise to the power 2 => (2b - 2)^2 = c, which is the expression given.

Now these are two equivalent forms:

1) extract 2 from the parentheses: c = 4 (b -1)^2

2) expand the parentheses: c = 4b^2 - 8b + 4)

Step-by-step explanation:

Choice D

8 0
3 years ago
F(x)=18x+11, find f(5)
Natalija [7]

Answer:

\boxed {\tt f(5)=101}

Step-by-step explanation:

We are given the function:

f(x)=18x+11

and asked to find f(5). Therefore, we must substitute 5 in for each x.

f(5)=18(5)+11

Solve according to PEMDAS: Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.

Multiply 18 and 5.

f(5)=90+11

Add 90 and 11.

f(5)=101

f(5) is equal to 101.

5 0
3 years ago
Plsssss<br>do all of the questions and I give you brainlist .make sure they are right ​
ozzi

Answer:

1) 6,000 B) 800 C) 4,000

2)7,500

3)third and fourth one

4)6,951

Step-by-step explanation:

just because

6 0
3 years ago
Read 2 more answers
How to solve 2x-8y=16
Darina [25.2K]
The answer of your question is x - 4 y=8
3 0
3 years ago
Other questions:
  • Write a number in each box to make the sentences true
    7·1 answer
  • Thom worked 20 hours last week at the sporting-goods store and earned
    10·1 answer
  • Bill wants to rent a car.Rental Company A charges $35 per day plus $0.10 per mile driven.Rental Company B charges $25 per day pl
    7·1 answer
  • If x/4=45/36 then what is x
    15·1 answer
  • HELP PLEASE PLEASE 50 PTS
    8·1 answer
  • Please answer
    15·1 answer
  • 00:00
    8·2 answers
  • Amrit initiated new venture with cash rupees 20000 and bank balance rupees 80000 journal entry​
    15·1 answer
  • Which pairs of figures are congruent? Which pairs are similar?
    8·1 answer
  • Please help quickly !!!! thank youuu!
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!