Amerchant mixed 10 lb of a cinnamon tea with 2 lb of spice tea. the 12-pound mixture cost $19. a second mixture included 16 lb of the cinnamon tea and 10 lb of the spice tea. the 26-pound mixture cost $44. find the cost per pound of the cinnamon tea and of the spice tea.

Okay so for every triangle has three angles that always add up to 180 degrees. and to tell the difference between whether they are secure, right or obtuse is that acute: has one angle that is less than 90 degrees. right triangle means there is at least one angle that is exactly 90 degrees. and an obtuse angle has an angle that is bigger than 180 degrees. i’ll do #13 as an example: 13. 40 and 50 so if every triangle has 180 degrees 40+50= 90 degrees then180-90= 90 degrees so the third angle is 90 degrees and because this triangle has a 90 degree angle it means it is a right triangle