Which equations support the fact that rational numbers are closed under subtraction? Select each correct answer

a, √8 - √8 = 0

b, 5√4 - √4 = 4√4

c, 5.5 - 0.5 = 4

d, 2√3 - √3 = √3

Question

James Bailey

Mathematics

3 March, 20:35

Which equations support the fact that rational numbers are closed under subtraction? Select each correct answer

a, √8 - √8 = 0

b, 5√4 - √4 = 4√4

c, 5.5 - 0.5 = 4

d, 2√3 - √3 = √3

+2

Answers (1)

Know the Answer?

Mason Steele · Answer 1

The rationals being closed under subtraction means that if we start with two rational numbers and subtract them, we get another rational number. Choice c subtracts two rational numbers but gets the wrong answer, so isn't support for anything. Choice b is rational too because the square root of 4 is 2.

Answer: b

Which equations support the fact that rational numbers are closed under subtraction? Select each correct answera, √8 - √8 = 0b, 5√4 - √4 = 4√4c, 5.5 - 0.5 = 4d, 2√3 - √3 = √3

Which equations support the fact that rational numbers are closed under subtraction? Select each correct answer

a, √8 - √8 = 0

b, 5√4 - √4 = 4√4

c, 5.5 - 0.5 = 4

d, 2√3 - √3 = √3