Write a linear expression in simplest form to represent the perimeter of the triangle. Then find the perimeter if the value of x is 10 millimeters.

Factor this polynomial completely x^2-64

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

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)