Given that ∠ABD = 76°, which equation could be used to solve problems involving the relationships between ∠DBC and ∠ABC?

Henry is an avid reader, he devours 90 pages in half an hour how many pages has henry read per minute?

The fence around a quadrilateral-shaped pasture is 3a^2+15a+9 long. three sides of the fence have the following lengths: 5a, 10a-2, a^2-7. what is the length of the fourth side of the fence?

The map shows the location of the airport and a warehouse in a city. though not displayed on the map, there is also a factory 112 miles due north of the warehouse.a truck traveled from the warehouse to the airport and then to the factory. what is the total number of miles the truck traveled?