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Q7.

Expert-verifiedFound in: Page 17

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" $1.2(x+3)$**

The value of the expression is **8.4**.

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

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

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

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.

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