Does anyone know how to add and subtract polynomials just in general? I dont think I fully understand how to do so if you do know please help.​

Atriangle has a side lengths of 18cm, 80 cm and 81cm. classify it as acute obtuse or right?

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?

If mary had 320 toy cars and she gave her friend 50 cars and then she gave her brother 72 more cars how much toy cars would mary have left ● explain with proper details