Chapter 1: Q7. (page 30)

Evaluate each expression if $a = - 4$ and $b = 1.5$
$- |a + 21|$

Short Answer

Expert verified

The absolute value of the expression is-17

Step by step solution

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 addition inside the bracket

Evaluate the absolute value

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

$\begin{matrix} - | a + 21 | = - | 4 + 21 | \\ = - | 17 | \end{matrix}$

Step3- Find the absolute value of expression inside the bracket

The absolute value of $- |17| = - 17$ .

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Evaluate each expression if $a = - 4$ and $b = 1.5$
$- |a + 21|$

Short Answer

Step by step solution

Step1- Order of evaluation

Step2-- Simplify the expression inside grouping symbol

Step3- Find the absolute value of expression inside the bracket

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Evaluate each expression if a=-4 and b=1.5-a+21

Short Answer

Step by step solution

Step1- Order of evaluation

Step2-- Simplify the expression inside grouping symbol

Step3- Find the absolute value of expression inside the bracket

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Probability and Statistics

Geometry

Calculus

Statistics

Mechanics Maths

Discrete Mathematics

Study anywhere. Anytime. Across all devices.

Evaluate each expression if $a = - 4$ and $b = 1.5$
$- |a + 21|$