Question

A set of numbers is shown below:

{0, 0.6, 2, 4, 6}

Which of the following shows all the numbers from the set that make the inequality 2x + 3 ≥ 7 true?
{4, 6}
{0, 0.6, 2}
{0, 0.6}
{2, 4, 6}

Answer 1

You can go through the set and test each one out:
x=0:
2(0)+3 ≥ 7? Or 3≥7? No

x=0.6:
2(0.6)+3≥7? 4.2≥7? No.

x=2:
2(2)+3≥7? 7≥7? Yes.

x=4:
2(4)+3≥7? 11≥7? Yes.

x=6:
2(6)+3≥7? 15≥7? Yes.

The set is {2, 4, 6}.