Please help I need to get this right

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)

Adiverr from the university of florida women’s swimming and diving team is competing in the ncaa zone b championships

Solve the system of equations using the substitution method. {y=−3x+7x=−2y−16 enter your answers in the boxes.