10 - 6y -104? Pls help doing a test

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?

Geometry in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.

Question 4 of 10 2 points what is the second part of the process of investigating a question using data? a. rephrasing the question o b. describing the data c. collecting the data o d. making an inference submit