body{margin:0;} noscript{z-index: 10000; position: fixed; display: block; height: 100%; width: 100%; background: #fff;} noscript .fa{font-size: 40px; display:block; color: #daa520;} noscript div{margin-top: 6%; padding-left: 20px; padding-right: 20px; text-align: center;} ! You must have JavaScript enabled to use this site.

McGraw Hill Integrated II, 2012

MH

McGraw Hill Integrated II, 2012 View details

Get Ready for the Chapter

Continue to next subchapter

Exercise 18 Page 91

An absolute value is always non-negative.

5

Practice makes perfect

To evaluate the given expression for b=- 1, we should substitute - 1 for b in the given expression. Remember that the absolute value acts as a grouping symbol, so we will perform the operations inside the absolute value bars first.

|4-b|

b= - 1

|4-( - 1)|

a-(- b)=a+b

|5|

|5|=5

5