What is the period of a wave if the wavelength is 10 m and the speed is 200 m/s?

20 hertz

Step-by-step explanation:

Given:

      Speed of the wave =200 m/s

      wavelength of the wave = 10 m

According to the formula :

Frequency=speed/wavelength

Frequency= 200/10

20 hertz or 20 wave periods per second

So, the number of periods of wave passing per second is 20

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)