Which expression calculates the speed in meters per second of an object that travels a distance of 100 m every 20 s?

Step-by-step explanation:

Alright, lets gets started.

We have given the distance as 100 meters.

The time for completing this distance is 20 seconds.

The formula for calculating speed is :

Hence plugging the values of distance and time in formula,

meters per second

We could further simplify this speed to 5 meters per second, but as the expression is asked in question, we will given answer meters per second.  

Hope it will help :)

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

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