Solve for x: √(x + 5) = 4 A x = 11 B x = 21 C x = 9 D x = −1 ✓ Correct Answer: Option A Square both sides: x + 5 = 16 → x = 11. Check: √(16) = 4. ✓ Practice SAT Exam Prep Quizzes → Browse All Questions Study Flashcards