Answer:
option D is rational
Step-by-step explanation:
A rational number is a number that can be written in the form of fraction or integer
here in the given question
A) 1.5 + √1.5
now,
√1.5 is not rational as √1.5 = 1.2247448713915890490986420373529
hence A is not rational
b) 12 - √12
√12 is not rational as √12 = 3.4641016151377545870548926830117
hence B is not rational
c) 
here,
is not rational
D) 
now,
√25 = 5
hence,
=
= 5
therefore,
option D is rational
Answer:
n = 5
Step-by-step explanation:
Given
5n + 20n = 5(n + 20), that is
25n = 5(n + 20) ← divide both sides by 5
5n = n + 20 ( subtract n from both sides )
4n = 20 ( divide both sides by 4 )
n = 5
Your answer is 10.4 I put in it my calculator
I believe its 0.08522727, idk if this is correct
i'm sorry if i'm wrong
~Zane
It would be 7/10 because since 10/10 is the Earth, and 3/10 is water, 10-3 is 7.