Does anyone else have trouble with math
For me I understand math but at the same time I don’t

Which number line correctly shows 0.8 + 0.3?

Given δjkl : δxyz, find x. a)10 b)12 c)16 d)20

C. using a standard deck of 52 cards, the probability of selecting a 4 of diamonds or a 4 of hearts is an example of a mutually exclusive event. true of false