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Chapter 1: Q. 9E (page 36)

Evaluate the expression when m=-6.

7-m

Short Answer

Expert verified

The value of the expression is13.

Step by step solution

01

Step 1. Apply the concept subtraction

Two numbers with similar signs get added and the resulting number carries the similar sign.

Two numbers with opposite signs get subtracted and the resulting number carries the sign of the larger number.

02

Step 2. Example for subtraction of numbers

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

And the difference of the numbers3-7=-4is negative because the larger number is negative as well.

03

Step 3. Evaluate the expression

To evaluate the expression 7-m, substitute -6for m and simplify further as shown below

7-m=7--6

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

7鈭�m=7鈭�鈭�6=7+6=13

Thus, the value of the expression is 13.

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