If 4 croissants costs $2.60. how much would 1 croissant cost?

That easy first u divide $2.60 by 4 for which will give you 0.65, so that means that 1 croissant cost $0.65 :)

In the first triangle 80+20+p=180 (since sum of all angles of a triangle is 180)so p= 80also in second triangle 55+45+q=180 (since sum of all angles of a triangle is 180)so q=80so we can conclude that p=80 degrees q=80 degrees so p=q=80 degreeshence option b is correct

B. 2 1/2 feet. multiply 2.5 inches by 12 to get thirty inches then divide by 12 to get 2.5 feet