If 3x is one factor of 3x^2+9x what is the other factor?
I'm really not sure on this!!!

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)

15m is what percent of 60m; 3m; 30m; 1.5 km? the last one is km not m

Write the equations in logarithmic form 9^4=6,561