Question

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

localid="1648624505758" $1.2x+3$

Short answer

The value of the expression is7.8.

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 – Multiply

In order to evaluate the given expression, first substitute 4 for x and then simplify the expression further by multiplying the first two numbers as shown below

$\begin{array}{c}1.2x+3=1.2\left(4\right)+3\\ =4.8+3\end{array}$

Step-3 – Add the numbers

Now to simplify further, add the resulting numbers to get

$\begin{array}{c}1.2x+3=1.2\left(4\right)+3\\ =4.8+3\\ =7.8\end{array}$

Thus, the value of the expression is 7.8.