Which of the following is the conjugate of a complex number with 5 as the real part and −2i as the imaginary part?
answers:
5 + 2i
−5 − 2i
−5 + 2i
5 − 2i

If a is a nonzero real number then the reciprocal of a is

The velocity of sound in air is given by the equation , where v is the velocity in meters per second and t is the temperature in degrees celsius. find the temperature when the velocity is 329 meters per second by graphing the equation. round the answer to the nearest degree. show your work.

What is the value of y? (picture attached)