Solve the equation by the quadratic formula.x2 + 9 = 0
A. ±3
B. 3
C. 3i
D. ±3i
Answer: D
Mathematics
You might also like to view...
Identify the multiplication model that best fits the problem. Do not solve the problem.Suppose there are 2 roads connecting town A to town B and 3 roads connecting town B to town C. In how many ways can a person travel from A to C via B?
A. Measurement model B. Cartesian product model C. Set model D. Array model
Mathematics
Find the length of the arc intercepted by a central angle ? in a circle of radius r. Round your answer to three decimal places when necessary.? = 
, r = 5 ft
A. 2.618 ft B. 9.549 ft C. 5.236 ft D. 3.77 ft
Mathematics
Find the mode.20, 40, 46, 40, 49, 40, 49
A. The mode is 40. B. The mode is 40.6. C. The mode is 49. D. The mode is 46.
Mathematics
Find the LCM of the set of numbers.3, 5, and 18
A. 90 B. 15 C. 270 D. 18
Mathematics