The following expression shows the relationship between wavelength, velocity and frequency of a wave:
Wavelength [m] = Velocity [m/s] /frequency [Hz]
Making velocity the subject of the formula;
Velocity = Wavelength*Frequency = 5*4.2 = 21 m/s
Answer:
Each person runs 3 miles in a relay race.
Step-by-step explanation:
Given:
Distance of Relay race m = 12 miles.
The expression m divided by 4 is the distance each person runs in a relay race that is m miles.
Each person runs in relay race =
Now given the total distance of the relay race is 12 miles.
i.e. value of m = 12 miles
Now substituting the value of m in above equation we get;
Each person runs in relay race =
Hence each person runs 3 miles in a relay race.
7 and 2 are addents
+ addition sign
= equal sign
9 sum