Find the derivative of the following functions

f (x) = x^7 - 2x^3 - 9x

Katy buys 4 DVDs every 2 weeks. How many DVDs will she buy in 14 weeks?

What is the factored form of 16x2 - 16x - 12? 4 (2x - 2) (2x + 2) 4 (4x - 6) (x + 2) 4 (2x - 2) (2x + 3) 4 (2x - 3) (2x + 1) What is the factored form of 3x2 + 21x - 24? 3 (x + 8) (x - 1) 3 (x + 6) (x - 3) 3 (x + 5) (x - 3) 3 (x + 7) (x - 3)

When you convert 100 ft per second to inches per second, will there be more or less than 100 inches. Explain

Tina lives 2 1/4 miles from the library Sonya lives 3 1/2 miles from the library how much further does Sonya live then Tina

Which are the coordinates of the vertices of a triangle congruent to ΔPQR? (0,5), (2,10), (0,10) (9,-3), (9,0), (4,0) (4,3), (-4,8), (-4,3) (2.5,-4), (0,0), (0,-4)

What type of polynomial is this. a 2 + bcd 3

Write the following equation in the general form Ax + By + C = 0. 1/2y - 1/3x - 1 = 0 a. - 2x + 3y - 6 = 0 b. 2x - 3y + 6 = 0 c. 2x - 3y - 6 = 0

I would like to purchase 20 products at a cost of $65 per product. What would be my total with 3.5 sales tax

A bag contains white marbles and red marbles, 90 in total. The number of white marbles is 6 less than 5 times the number of red marbles. How many white marbles are there?

Solve  ABC given  C = 90, a = 88 cm, and c = 117 cm.