Question

Solve the inequality z−18≥−23 and write the solution in interval notation, using improper fractions if necessary

Answer 1

z ∈ [-5; +∞)

Explanation:

z - 18 ≥ - 23

<=> z ≥ 18 - 23

<=> z ≥ -5

----> z ∈ [-5; +∞)

Answer 2

Answer: [-5,∞)

Explanation:

z-18 ≥ -23 Add 18 to both sides

+18 +18

z ≥ -5

Which means x has to be greater than negative 5.

In interval notation it will be [-5,∞)