Question

Solve the inequality. Write the solution in interval notation. Choose the correct solution. 6x > – 24
A. [ –24, ∞ ) B. [ – 4, ∞ ) C. ( –∞, 24 ] D. ( – 4, ∞ ]

Answer 1

Divide by 6.
  -4 < x

The appropriate solution is (-4, ∞).

_____
No value is equal to ∞, so (-4, ∞] seems inappropriate. Since the comparison symbol is < rather than ≤, [-4, ∞) is definitely inappropriate.