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Chapter 1: Q21. (page 30)

Evaluate each expression if a=-5, b=6 and c=2.8

2b-15

Short Answer

Expert verified

The absolute value of expression is3.

Step by step solution

01

Step1- Order of evaluation

To evaluate any expression involving one operation, follow the below order of operation

  • First replace the algebraic expression inside the grouping symbols like matrix brackets ( ) with numeric expression
  • Perform the multiplication inside the bracket
  • Perform the subtraction inside the bracket
  • Evaluate the absolute value
02

Step2- Simplify the expression inside grouping symbol

To evaluate the value of given expression , simply the expression inside the bracket and then find the absolute value of expression as shown below

2b-15=2脳6-15=-3

03

Step3- Find the absolute value of expression inside the bracket

The absolute value of -3=3.

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Most popular questions from this chapter

Evaluate each expression if w=6,x=0.4,y=12,and z=-3

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Determine which expression below represents the amount of change someone would receive from a \(50bill if they purchased 2 children鈥檚 ticket at \)4.25each and 3 adult ticket at $7each at a movie theatre. Explain.

a.50鈭�2脳4.25+3脳7b.50鈭�2脳4.25+3脳7c.50鈭�2脳4.25+3脳7d.50鈭�2脳4.25+3脳7

Answer the question that was posed at the beginning of the lesson.

How are formulas used by nurses?

Include the following in your answer:

  • an explanation of why a formula for the flow rate of an IV is more useful than a table of specific IV flow rates, and
  • a description of the impact of using a formula, such as the one for IV flow rate, incorrectly.

Find the value of each expression

38-8-3梅3

Name the property illustrated by each equation.

28. 5a+-5a=0
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