May someone please help me to understand how to solve my AP calculus review problems? I was absent for a lot of this stuff and don't understand.

dry 7. = x4+x3 +x2 + x; find dxxz-2 (A) - 42 (B) - 23 (C) 0 (D) 24 8. Given the relation x2 - xy + y3 = 7, determine the slope of the line tangent to the curve at (1, 2). (A) - T (B) 0 (C) (D) 14 9. If f is an always positive, differentiable function and y = In (f(sin x)), what is _ when x = 4? dy cos 4 f (sin 4) (A) f' (cos 4) (c) (sin 4) f (cos 4) (B) F (sin 4) f (sin 4) (D) f (sin 4) 10. Given h(x) = sin '(5x), find h'(x). (A) 5cos '(5x) (B) - 5 sin 2(5x) 1 5 (C) V1 - 25x2 (D) V1 - 25x2 11. The function h consisting of three line segments is shown to the right. If k is a function such that k(h(x)) = h(k(x)) = x, find the value of k' (0). graph of h(x) (A) does not exist (B) - (C): (D) 2