Answer
$\angle x\ is\ 30^o$
$\angle z\ is\ 30^o$
$\angle y\ is\ 150^o$
Work Step by Step
Angles x and z are complementary to the angle measuring $150^o$.
$180^o-150^o=30^o$
Angles x and z are also complementary to angle y, so angle y is $150^o$