Find an equation for the perpendicular bisector of the line segment whose endpoints are (-9,3) and (1,7)

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

Simplify the expression 10/11(22z) + (a+5) -1

Ineeeeed this is due tomorrow and i dont know the answer can you find all the exponents