Chapter 1: Q. 298 - Exercises (page 76)

In the following question, evaluate the expression.
$x + (- 21)$ when (a) $x = - 27$ , (b) $x = 44$ .

Short Answer

Expert verified

(a) $- 48$ when $x = - 27$ .

(b) $23$ when $x = 44$ .

Step by step solution

Step 1. Given information .

Consider the given expression $x + (- 21)$ .

(a) $x = - 27$ , (b) $x = 44$

Step 2. Find the value when x=-27.

Substitute the value of x in the given expression .

$\Rightarrow x + (- 21) \Rightarrow - 27 + (- 21) \Rightarrow - 27 - 21 \Rightarrow - 48$

Therefore the value is $- 48$ when $x = - 27$ .

Step 3. Find the value when x=44.

Substitute the value of x in the given expression .

$\Rightarrow x + (- 21) \Rightarrow 44 + (- 21) \Rightarrow 44 - 21 \Rightarrow 23$

Therefore the value is $23$ when $x = 44$ .

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In the following question, evaluate the expression.
$x + (- 21)$ when (a) $x = - 27$ , (b) $x = 44$ .

Short Answer

Step by step solution

Step 1. Given information .

Step 2. Find the value when x=-27.

Step 3. Find the value when x=44.

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In the following question, evaluate the expression.x+-21when (a)x=-27, (b)x=44.

Short Answer

Step by step solution

Step 1. Given information .

Step 2. Find the value when x=-27.

Step 3. Find the value when x=44.

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Calculus

Probability and Statistics

Geometry

Discrete Mathematics

Mechanics Maths

Study anywhere. Anytime. Across all devices.

In the following question, evaluate the expression.
$x + (- 21)$ when (a) $x = - 27$ , (b) $x = 44$ .