I have attached a photo to my math problem

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

Sandy is upgrading her internet service. fast internet charges $20 for installation and $52.45 per month. quick internet has free installation but charges $57.45 per month. part 1 out of 2 complete the equation that can be used to find the number of months after which the internet service would cost the same. use the variable x to represent the number of months of internet service purchased.

In a hospital ward, there are 15 nurses and 3 doctors. 9 of the nurses and 1 of the doctors are female. if a person is randomly selected from this group, what is the probability that the person is male or a doctor?