**Answer:**

c

**Step-by-step explanation:**

cc

**Answer:**

x = - 2 or x = 4

**Step-by-step explanation:**

the expression inside the absolute value can be positive or negative

Removing the bars and solve x - 1 = ± 3

x - 1 = - 3 or x - 1 = 3

x - 1 = - 3 ( add 1 to both sides ) ⇒ x = - 2

x - 1 = 3 ( add 1 to both sides ) ⇒ x = 4

**Answer:**

B.

**Step-by-step explanation:**

The original equation is cos 64 = 32/k. To solve for k we need to isolate it. we can multiply by k then divide by cos 64. This gives us the equation k = 32/cos 64. Therefore, B is the right answer.

**Answer:10**

**Step-by-step explanation:**