Which operations is the following set closed under: (... , -3, -1, 1, 3, ...)?

If the speed of an electromagnetic wave is 100,000 cm/s and its wavelength is 100 cm, what is its frequency? a) 100,000 cycles per second (hz) b) 1 × 10-3 cycles per second (hz) c) 10,000,000 cycles per second (hz) d) 1,000 cycles per second (hz)

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

Solve the following inequalities and show the solution on a number line. 2x+3< 3(4x+5)