Sammy planted 526 heads of lettuce. don planted 98 more than sammy and 49 more than linda. how many heads of lettuce did linda plant? did they leave something out here? not sure.

575 because you add the 526 and 98 then subtract the 49 to get your answer

Don = 526 + 98 = 624 lettuce heads Don = 49 + Linda 624 = 49 + Linda 624-49 = Linda 575 = Linda Therefore, Linda planted 575 heads of lettuce.

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