Question

Please please help me!!can you also check if the numbers in the box where i typed is correct?

Answer 1

They already cover 20 mi and every hour they advance 50mi, so if we call f(x) as the distance and x as the time in hours the function will be:

`f(x)=50x+20`

The mimimun value for x has to be 0 because when x = 0, f(x) is equal to 20 that is the initial position.

and fot the maximun values of x will be when f(x) = 120

`120=50x+20`

and we solve for x

`\begin{gathered} 120-20=50x \\ 100=50x \\ (100)/(50)=x \\ 2=x \end{gathered}`

so the domain will be:

`0\le x\le2`