Anna is x years old and her sister, Jane, is y years younger. 1) How old is Jane?
2) How old was Anna 3 years ago?
3) How old will Jane be in 5 years?
4) What is the sum of their current ages?
I know it's a lot but please help me :)

In a certain pentagon, the interior angles are a, b,c, d,e where a, b,c, d,e are integers strictly less than 180. ("strictly less than 180" means they are "less than and not equal to" 180.) if the median of the interior angles is 61 and there is only one mode, then what are the degree measures of all five angles?

Given: ac and db are diameters. m∠3=

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10