100 points & i'll give brainliest! find the indicated intersection or union. express your answers in interval notation
(-1,1) U [0,6]

Union means you take everything that was included in either individual interval.

The first interval goes from -1 to 1 (not including either endpoint).
The second interval goes from 0 to 6 (including both endpoints).

So, the first one starts at -1 and keeps going to the right, overlapping where the second one picks up and you keep going until you get to 6.

You still need to leave out -1 and include 6.

(-1,6]

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