To solve 2x + 9 = 21, what is the first step?
A. Dividing each side by 2
B. Dividing each side by x
C. Subtracting 21 from each side
D. Subtracting 9 from each side

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

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

Ineed to know the answer to this algebra question.