What is the missing constant term in the perfect square that starts with x^2-16x? pretty stumped on this one. in advance!

What is the size of the matrix resulting from

What is the value of r of the geometric series?

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer