Question

Look at the inequality below. Which of the values is not a solution to the inequality. 2x - 5 <= 13 Options:12 3 -2 9

Answer 1

We have the following:

$2x-5\le13$

solving for x:

$\begin{gathered} 2x-5\le13 \\ 2x-5+5\le13+5 \\ 2x\le18 \\ x\le\frac{18}{2} \\ x\le9 \\ (-\infty,9\rbrack \end{gathered}$

Therefore, the answer is 12, because it is a number greater than 9 and it is not in the interval