Question

Evaluate the expression when $x=4\text{and}y=2$

localid="1648624430882" $1.2(x+3)$

Short answer

The value of the expression is8.4.

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

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

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.