Chapter 1: Q 124. (page 39)

In the following exercises, evaluate each expression.
$7 m - 4 n - 2$ when $m = - 4$ and $n = - 9$

Short Answer

Expert verified

The value obtained is 6.

Step by step solution

Step 1. Given Information:

The given expression is $7 m - 4 n - 2$ and the value of the variables are $m = - 4$ and $n = - 9$ .

Step 2. Substitute the values:

Substitute $- 4$ for $m$ and $- 9$ for $n$ into the given expression $7 m - 4 n - 2$ .

$7 (- 4) - 4 (- 9) - 2$

Step 3. Multiply:

Perform multiplication from left to right in the obtained expression.

$(- 28) - (- 36) - 2$

Step 4. Perform Subtraction:

Subtract $- 36$ from $- 28$ in the obtained expression.

$\begin{array}{rcl} (- 28) - (- 36) - 2 & = & (- 28) + 36 - 2 \\ = & 8 - 2 \end{array}$

Step 5. Perform Subtraction:

Subtract 2 from 8 in the obtained expression.

$8 - 2 = 6$

Step 6. Conclusion:

The value obtained is 6.

Unlock Step-by-Step Solutions & Ace Your Exams!

Full Textbook Solutions
Get detailed explanations and key concepts
Unlimited Al creation
Al flashcards, explanations, exams and more...
Ads-free access
To over 500 millions flashcards
Money-back guarantee
We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

Recommended explanations on Math Textbooks

View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

In the following exercises, evaluate each expression.
$7 m - 4 n - 2$ when $m = - 4$ and $n = - 9$

Short Answer

Step by step solution

Step 1. Given Information:

Step 2. Substitute the values:

Step 3. Multiply:

Step 4. Perform Subtraction:

Step 5. Perform Subtraction:

Step 6. Conclusion:

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Mechanics Maths

Logic and Functions

Discrete Mathematics

Applied Mathematics

Statistics

Study anywhere. Anytime. Across all devices.

In the following exercises, evaluate each expression. 7m-4n-2when m=-4 andn=-9

Short Answer

Step by step solution

Step 1. Given Information:

Step 2. Substitute the values:

Step 3. Multiply:

Step 4. Perform Subtraction:

Step 5. Perform Subtraction:

Step 6. Conclusion:

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Theoretical and Mathematical Physics

Mechanics Maths

Logic and Functions

Discrete Mathematics

Applied Mathematics

Statistics

Study anywhere. Anytime. Across all devices.

In the following exercises, evaluate each expression.
$7 m - 4 n - 2$ when $m = - 4$ and $n = - 9$