Identify a possible pattern. use the pattern to write the next three numbers
152,137,

You basically subtract 15 from a number then continue doing it each time

So 152, 137, 122, 107, 92, 77...

Another way to tell is if you minus 137 from 152, its 15

Do that again to the next number which is 137 minus 122 and its 15.

You can do this just to check and make sure you are doing it right

The pattern is subtracting 15 from each number as you go along the pattern.

Answer d; a supplementary angle = 180°, so if that angle = 150°, y would = 30°.