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
Elza [17]
2 years ago
7

Which equations support the fact that rational numbers are closed under subtraction?

Mathematics
1 answer:
Illusion [34]2 years ago
7 0

Answer:

A rational number is said to be closed if the subtracted values and the result obtained are rational. Hence, the equations which supports the condition are :

5.5 - 0.5 = 4

5√4 - √4 = 4√4

Step-by-step explanation:

A.)

√8 - √8 = 0 ; the added values aren't rational and the result, Zero is not rational either.

B.)

5√4 - √4 = 4√4

5(2) - 2 = 2(2)

10 - 2 = 4

All the values in the expression are rational ; hence, it supports the assertion.

C)

5.5 - 0.5 = 4 ; all the values in the expression are rational, hence, it supports the fact.

2√3 - √3 = √3 ; the values in the expression are not rational, hence, it does not meet the condition.

Therefore, only options B and C supports the assertion.

Let me add that I learned most of this from Brainly a user named fichoh :)

You might be interested in
ASAP help me please thanks
Marianna [84]

Answer: I think it's D

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
WILL GET BRAILIEST FOR CORRECT ANSWER
Alex Ar [27]

Answer:

x = ± \sqrt{20}

Step-by-step explanation:

Given

x² = 20 ( take the square root of both sides )

x = ± \sqrt{20}

which can be simplified to

x = ± 2\sqrt{5}

[ ± means plus or minus ]

5 0
3 years ago
What simplified ratio correctly compares 10,000 centimeters to 1000 meter?
alexdok [17]
The answer is 10/1 ratio. Hope this helps!
5 0
3 years ago
Read 2 more answers
What 2 numbers add to get 2 and multiply to 4
rusak2 [61]
Factor 4
4=1 times 4
2 times 2
they don't add to 2
set up equation
x+y=2
xy=4

first equation, subtract x from both sides
y=2-x
subsitute for y
x(2-x)=4
distribute
2x-x^2=4
add x^2
2x=x^2+4
subtract 2x
0=x^2-2x+4
use quadratic formula which is
if you have ax^2+bx+c=0 then
x=\frac{ -b+/-\sqrt{b^{2}-4ac} }{2a} so

1x^2-2x+4=0
a=1
b=-2
c=4
x=\frac{ -(-2)+/-\sqrt{(-2)^{2}-4(1)(4)} }{2(1)}
x=\frac{ 2+/-\sqrt{4-16} }{2}
x=\frac{ 2+/-\sqrt{-12} }{2}
we have \sqrt{-12} and that doesn't give a real solution
therefor there are no real solutions
but if you want to solve fully
x=\frac{ 2+/-2\sqrt{-3} }{2}
i=\sqrt{-1}
x=\frac{ 2+/-2i\sqrt{3} }{2}
x=1+/-i\sqrt{3}
x=1-i\sqrt{3} or x=1+i\sqrt{3} (those are the 2 numbers)

 





6 0
3 years ago
How do you find slope intercept from a graph
Makovka662 [10]

The slope intercept is equal to the rise/run.


So lets say to get from one point to the other, you go down 2 units and go right 3 units.


Since you went down it is a -2. If you had gone up 2 units, then it would be a positive 2.

Since you went to the right, it is a positive 3. If you had gone left 3 units, then it would be -3.


-2/3

4 0
3 years ago
Other questions:
  • In a survey of a town, 56% of residents own a car, 21% of residents now a truck, and 4% of residents own both a car and a truck.
    11·2 answers
  • Is LMN a right triangle ???
    12·2 answers
  • What is the answer ?
    11·1 answer
  • A recipe calls for 1 part beans to 1½ parts rice. If 1½ parts of beans are used, how much rice should be used?
    14·1 answer
  • Consider the following game. There is a bottle with 20 colored chips inside. There are 2 blue chips, 4 purple chips, 7 green chi
    8·2 answers
  • What is the value of x? 40,000 mg = 10x g. A.400 B.40 C.4 or D 0.4
    8·2 answers
  • A lemonade recipe calls for 1/4 cup of lemon juice for every cup of water.
    8·1 answer
  • PLEASE HELP MEEE! DON'JOKING PLEASEEE!
    8·2 answers
  • There are 86 calories in 100 g of banana
    5·1 answer
  • Gary weighed 187 pounds after graduating
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!