Solve the system of equations by the substitution method. Select the correct choice below​ and, if​ necessary, fill in the answer box to complete your choice.
A.
The solution is
nothing. ​(Simplify your answer. Type an ordered​ pair.)
B.
There are infinitely many solutions.
C.
There is no solution.

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

Are the corresponding angles congruent? explain why or why not.

Which of the following vectors are orthogonal to (2,1)? check all that apply