Algebra: A Combined Approach (4th Edition)

a. $|7| = 7$ b. $|-8| = 8$ c. $|\frac{2}{3}| = \frac{2}{3}$ d. $0 = 0$ e. $|-3.06| = 3.06$
The $|x|$ symbols are absolute value signs and refer to how far away a number is from 0, without any regard to its sign. From this, the answer is always the positive of the number within the absolute value symbols.