Chapter 1: Q83. (page 18)

Evaluate each expression if $a = 2, b = - \frac{3}{4},$ and $c = 1.8$ .
$8 b - 5$

Short Answer

Expert verified

Expression $8 b - 5$ results into $- 11$

Step by step solution

- Order for simplification

To evaluate any expression involving more than one operation, follow the below order of operations:

First evaluate expressions inside grouping symbols like parentheses ( ) or brackets [ ].
Evaluate the exponents.
Perform Multiplication and division from left to right.
Perform addition and subtraction from left to right.

- Substitute given values

Substitute $- \frac{3}{4}$ for b into given expression

$8 b - 5 = 8 (- \frac{3}{4}) - 5$

- Simplify 8-34-5

To evaluate, firstly perform multiplication and finally subtraction from left to right to get

$\begin{matrix} 8 (- \frac{3}{4}) - 5 = - (\frac{8 \times 3}{4}) - 5 \\ = - 6 - 5 \\ = - 11 \end{matrix}$

Thus, $8 b - 5 = - 11$

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Evaluate each expression if $a = 2, b = - \frac{3}{4},$ and $c = 1.8$ .
$8 b - 5$

Short Answer

Step by step solution

- Order for simplification

- Substitute given values

- Simplify 8-34-5

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Evaluate each expression if a=2,b=-34,and c=1.8.8b-5

Short Answer

Step by step solution

- Order for simplification

- Substitute given values

- Simplify 8-34-5

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Probability and Statistics

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Study anywhere. Anytime. Across all devices.

Evaluate each expression if $a = 2, b = - \frac{3}{4},$ and $c = 1.8$ .
$8 b - 5$