Chapter 1: Q80. (page 18)

Evaluate each expression if $a = - 5, b = 0.25, c = \frac{1}{2},$ and $d = 4$ .
80. $a + 2 b - c$

Short Answer

Expert verified

Expression $a + 2 b - c$ results into -5

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 -5 for a, 0.25 for b and $\frac{1}{2}$ for c into given expression

$a + 2 b - c = (- 5) + 2 (0.25) - \frac{1}{2}$

- Simplify -5+20.25-12

Now, to simplify firstly perform multiplication then addition/subtraction from left to right to get

$\begin{matrix} (- 5) + 2 (0.25) - 0.5 = - 5 + 0.5 - 0.5 \\ = - 5 \end{matrix}$

Thus, $a + 2 b - c = - 5$

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Evaluate each expression if $a = - 5, b = 0.25, c = \frac{1}{2},$ and $d = 4$ .
80. $a + 2 b - c$

Short Answer

Step by step solution

- Order for simplification

- Substitute given values

- Simplify -5+20.25-12

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Evaluate each expression if a=-5,b=0.25,c=12, andd=4.80. a+2b-c

Short Answer

Step by step solution

- Order for simplification

- Substitute given values

- Simplify -5+20.25-12

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

Pure Maths

Applied Mathematics

Theoretical and Mathematical Physics

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Discrete Mathematics

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Study anywhere. Anytime. Across all devices.

Evaluate each expression if $a = - 5, b = 0.25, c = \frac{1}{2},$ and $d = 4$ .
80. $a + 2 b - c$