Write an equation to describe the relationship between the distance she runs in miles, $$, and her running speed, in miles per hour, when she runs at a constant speed of 5 miles per hour the first 20 minutes, and then at 4 miles per hour the last 10 minutes

5m x 20  

4m x 10

Step-by-step explanation:

the circle graph is not a function.

step-by-step explanation:

the graph of the circle is not a function.

because for a graph to be a function, each value of x must give one value of y

in the circle, the values of x for -2< x< 2 each give 2 values of y.

hence this is not a function.

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}