Brian is adding the lengths of wood posts that he has left from building a pen for his chickens. A photo of chickens is shown.

The lengths are 323, 214, and 213. Brian began with 20 feet of wood.

Write and then evaluate a fraction expression to determine how much wood he used for the pen.
Enter the correct answers in the boxes.

Find the value of the cosine for angle a

F(n + 1) = f(n) – 8. if f(1) = 100, what is f(6)?

Abag contains 4 red, 7 blue and 5 yellow marbles. event a is defined as drawing a yellow marble on the first draw and event b is defined as drawing a blue marble on the second draw. if two marbles are drawn from the bag, one after the other and not replaced, what is p(b|a) expressed in simplest form? a. 7/16 b. 7/15 c. 14/16 d. 14/15