The law of cosines for rst can be set up as 52 = 72 + 32 – 2(7)(3)cos(s). what could be true about rst?

law of cosines: a2 = b2 + c2 – 2bccos(a)

r = 5 and t = 7
r = 3 and t = 3
s = 7 and t = 5
s = 5 and t = 3

Solve the system of equations. y= 2x y= x^2 - 15

The equation respenting the left table is

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