Question

Which number gives you an irrational when u add it to 8?

A. sqt4
B. 5/9
C. -8
D. sqt5

Answer 1

D. sqt5

Explanation:

The best process is to start eliminate answers. It can not be C because

-8 + 8 =0. 0 is not an irrational number. Sqt4 is 2, 2+8=10. 10 is a real rational number. 5/9 is not an irrational number because it is a ratio of 5 to the non-zero quotient of 9. Sqt5 is the only irrational number, and when added to 8, it is still irrational.