Question

if $x = 5$, what is the value of the expression $2x + 3$?
options: 13, 10, 15, 8

Explanation:

Step1: Substitute x = 5 into the expression

We have the expression \(2x + 3\). Substitute \(x = 5\) into it, so we get \(2\times5 + 3\).

Step2: Calculate the multiplication first

According to the order of operations (PEMDAS/BODMAS), we first calculate the multiplication: \(2\times5 = 10\). Now the expression becomes \(10 + 3\).

Step3: Calculate the addition

Then we calculate the addition: \(10 + 3 = 13\).

Answer:

13 (corresponding to the option with 13)