How many black t shirts would hannah and dario need to sell to make up the loss in profit?

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

What are the coordinates of the hole in the graph of the function f(x) ? f(x)=x2−9x−3 enter your answer in the boxes.

Which equation is y = -6x2 + 3x + 2 rewritten in vertex form?