Chapter 1: Q85. (page 18)

Evaluate each expression if $a = 2, b = - \frac{3}{4},$ and $c = 1.8$ .
$1.5 c - 7$

Short Answer

Expert verified

Expression $1.5 c - 7$ results into $- 4.3$

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 1.8 for c into given expression

$1.5 c - 7 = 1.5 (1.8) - 7$

- Simplify 1.51.8-7

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

$\begin{matrix} 1.5 (1.8) - 7 = 2.7 - 7 \\ = - 4.3 \end{matrix}$

Thus, $1.5 c - 7 = - 4.3$

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Year	Average CPI
1950	42.1
1960	29.6
1970	38.8
1980	82.4
1990	130.7
2000	174.0

Evaluate each expression if $a = 2, b = - \frac{3}{4},$ and $c = 1.8$ .
$1.5 c - 7$

Short Answer

Step by step solution

- Order for simplification

- Substitute given values

- Simplify 1.51.8-7

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Evaluate each expression if a=2,b=-34,and c=1.8.1.5c-7

Short Answer

Step by step solution

- Order for simplification

- Substitute given values

- Simplify 1.51.8-7

One App. One Place for Learning.

Most popular questions from this chapter

Recommended explanations on Math Textbooks

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Study anywhere. Anytime. Across all devices.

Evaluate each expression if $a = 2, b = - \frac{3}{4},$ and $c = 1.8$ .
$1.5 c - 7$