Solve for the variable k^2+9k=0

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

Asegment in the complex plane has a midpoint at 7 – 2i. if the segment has an endpoint at 11 – 3i, what is the other endpoint?

Mis the midpoint of rq if rm equals 2x + 5 and mq equals 4x - 9 what is the length of rq