Can someone answer this for me 9- 6x -8

"princess tower" in dubai is considered the world's tallest residential building, towering to 1 0 1 101 floors! t ( n ) t(n) models the number of tenants living on floor n n of the tower. what does the statement t ( 2 0 ) = t ( c ) t(20)=t(c) mean?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

Ineed to know the answer to this algebra question.