M-p (m=-4, n=5 ,p=15)

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

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?

Find the zeros of each function. f(x) = x^2 + 5x - 6