Can someone please help me with this question?

Marcus and cody both leave the park at the same time, but in opposite directions. if cody travels 6 mph faster than marcus and after 4 hours they are 64 miles apart, how fast is each traveling? solve using rare times time = distance.

Rationalize the denominator- 12x/√x-10

Given the following linear function sketch the graph of the function and find the domain and range. ƒ(x) = -5x + 4