What is the answer to 6(-3-4y) simplifying algebraic expressions

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)

F(x)=5/6x+3 which of the following is true

1.based of the diagrams what is the the value of x? 2.how would you verify your answer for x