Ineed what's my equation for the picture below.

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)

What are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

What is the length and width of a 84.5 square foot rug? will mark