Rationalise the denominator 1/5+root 2

3. solve the given inequality and graph the solution on a number line.

Lena reflected this figure across the x-axis. she writes the vertices of the image as a'(−2, 8), b'(−5, 6), c'(−8, 8), d'(−4, 2).

Identify the number as a rational or irrational. explain. 127