Q30. Evaluate the expression when m=-... [FREE SOLUTION]

91影视

Pre-algebra

Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff

$Math Studyset 91影视 Explanations$ Math

Common Core Edition 路 183 pages

ISBN: 9780547587776

Chapter 1: Q30. (page 36)

Evaluate the expression when $m = - 6$ .
localid="1649144160808" $20 - m - 5$

Short Answer

Expert verified

The value of the expression is $21$ .

Step by step solution

Step-1 – Apply the concept of subtraction

To add two numbers with similar signs, add their absolute values and keep the similar sign with the resulting number.

To add two numbers with opposite signs, subtract the absolute value of smaller number from absolute value of larger number and keep the sign of larger number with the resulting number.

Step-2 – Example for subtraction of numbers

The difference of the numbers $7 - 3 = 4$ is positive because the larger number is positive as well.

And the difference of the numbers $3 - 7 = - 4$ is negative because the larger number is negative as well.

Step-3 – Evaluate the expression

To evaluate the expression $20 - m - 5$ , substitute $- 6$ for m and simplify further as shown below

\begin{matrix} 20 鈭� m 鈭� 5 = 20 鈭� 5 鈭� m \\ = 15 鈭� m \\ = 15 鈭� (鈭� 6) \end{matrix}

To subtract $- 6$ , add its opposite $6$ and simplify further as shown below

\begin{matrix} 20 鈭� m 鈭� 5 = 15 鈭� (鈭� 6) \\ = 15 + 6 \\ = 21 \end{matrix}

Thus, the value of the expression is $21$ .

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91影视

Evaluate the expression when $m = - 6$ .
localid="1649144160808" $20 - m - 5$

Short Answer

Step by step solution

Step-1 – Apply the concept of subtraction

Step-2 – Example for subtraction of numbers

Step-3 – Evaluate the expression

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91影视

Evaluate the expression when m=-6.localid="1649144160808" 20-m-5

Short Answer

Step by step solution

Step-1 – Apply the concept of subtraction

Step-2 – Example for subtraction of numbers

Step-3 – Evaluate the expression

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Decision Maths

Probability and Statistics

Applied Mathematics

Pure Maths

Logic and Functions

Calculus

Study anywhere. Anytime. Across all devices.

Evaluate the expression when $m = - 6$ .
localid="1649144160808" $20 - m - 5$