Cost per mile is calculated by dividing total cost by total miles. using the notation p = cost per mile, c = total cost, and m = total miles, show this relationship in algebraic equation form.

Acar started driving from city a to city b, distance between which is 620 miles, at a rate of 60 mph. two hours later a truck left city b and started moving towards city a at a rate of 40 mph. how many hours after the truck's departure will the two meet?

What is the slope of the line (-7,2) (4,6)

I’m still confused on how to work the percentages