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Expert-verified Found in: Page 17 ### Pre-algebra

Book edition Common Core Edition
Author(s) Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff
Pages 183 pages
ISBN 9780547587776 # Evaluate the expression when $x=4\text{and}y=2$localid="1648624430882" $1.2\left(x+3\right)$

The value of the expression is 8.4.

See the step by step solution

## Step-1 – Order of operations

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

## Step-2 – Solve the expression inside grouping symbols

In order to evaluate the given expression, first substitute 4 for x and then simplify the expression inside the parenthesis first.

So, add the numbers inside the parenthesis to get

$\begin{array}{l}1.2\left(x+3\right)\\ =1.2\left(4+3\right)\\ =1.2\left(7\right)\end{array}$

## Step-3 – Multiply and divide from left to right

Now to simplify further, multiply the resulting numbers to get

$\begin{array}{l}1.2\left(7\right)\\ =8.4\end{array}$

Thus, the value of the expression is 8.4. ### Want to see more solutions like these? 