I think the answer is #4 because if Jessica was 3, three years ago then Mandy was 6 but now Mandy is now 12 because Jessica is 6.
Sorry if my explanation is confusing.
I don’t know how to do that
Turn it improper 6 2/5 = 32/5
3 1/6 = 19/6
Multiply across
19/6*32/5 = 508/30 reduces to 254/15 hope this helps
It depends on the shape.Obtuse if longer than 90 degrees,acute if smaller than 90 degrees ,and right angle if exactly 90 degrees