Add 3 5/6 + 2 5/9 simplify the answer and multiply as a mixed number

Customers at an ice-cream shop took a survey .the results showed that 144 customers rated the shop as being "very satisfactory ."this number represented 45%of the total nunber of customers who took the survey

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

What is the distance between point a and b