In what periods are the lanthanides and actinides? Where are they placed in the periodic table? Why?

3(10x-y)-5(x-y^2) need this solved asap

Abiologist is recording the loss of fish in a pond. he notes the number of fish, f, in the pond on june 1. on july 1 there were 63 fish in the pond, which is 52 fewer fish than were in the pond on june 1. which equation represents this situation? a. f – 52 = 63 b. f – 63 = 52 c. 63 – f = 52 d. f – 63 = –52

Using the quadratic formula find the zeros of the given polynomial -5x^2+3x-11