Abackpack contains 4 orange erasers, 3 purple erasers, and 1 pink eraser. two erasers are randomly chosen from the backpack. how many different color combinations are possible?

Just tell me how to set up the equation.

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 with angles and the measure of them i have abc a is 65 and b is (3x-10) and c is (2x) find the value of x