1.) (x+9)(x+3)
2.) (y-5)(y^-2y+6)
me with solution so that next time i know how to answer for me by this is vey hard to answer. you.

(40 points) i need some . an answer definition is appreciated as well.

Which expression is equivalent to the expression shown?

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)