What is the answer to this algebra question -2(x+4)=8x+1

When i add money am i supposed to make it like this 7+12 or 7.00+12.00 because i got 19 dollars for my answer

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

Someone answer asap for ! 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?