Combine and simplify. 6y/23-6y-6/23-2/23

Five dinosaurs go for a walk and come across some lovely chicken wings. their names are rexy, bronto, steggy, paly, and terry. there are exactly 5 dozen wings(equal enough for each dino to have a dozen right? ); however, terry is on a diet and he only eats 6 wings. if paly eats 2 more than terry, steggy eats 4 more than paly, and bronto and rexy eat the same amount because they are really hungry from not eating all day, how many chicken wings did each dino eat?

This is about circle theorems. someone asap : (

Which of the following pair(s) of circles have las a common external tangent? select all that apply. a and b a and c b and c