I've tried to get the answer for this 11 times now, plzzz help: write a formula that represents the number of people in the nth row (pre-calc problem, I only need the formula)

Explain step-by-step how to simplify -5(2x – 3y + 6z – 10).

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

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)