ACT Math Practice Question
Given $i = \sqrt{-1}$, what is $\sqrt{9} + \sqrt{-16}$?
- A.$7i$
- B.$i\sqrt{7}$
- C.$3 - 4i$
- D.$3 + 4i$
Want to know if you got it right?
Answer this and thousands more real ACT previous-year questions free, get graded instantly, and climb the global ranked leaderboard.
Practice ACT free →More ACT Math questions
- Cameron took 4 tests, and his scores were as follows: 100, 60, 80, and 30. Cameron took an…
- In \triangle ABC, \angle A and \angle C are congruent, and the measure of \angle B is 143.…
- Which of the following expressions is equivalent to x^2 - x - 30?…
- Which of the following matrices is equal to 5 \begin{bmatrix} -4 & 2 \\ 0 & -5 \end{bmatri…
- Lavonne purchased some tickets and snack vouchers for an upcoming event and gave them to t…
- The initial speed, in miles per hour, of a certain car that skids to a stop can be estimat…
- If 6y = 5x - 1, then x = ?…
- A boat is traveling at a speed of 30 miles per hour. What is the boat's speed in feet per …