For what natural numbers of n: (−27.1+3n)+(7.1+5n) is negative? I have a inequality not sure how to put in correct way though.

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. what distance from city a is the point where the truck and the car will meet?

For the feasibility region shown below find the maximum value of the function p=3x+2y

Solve the inequaliy: (x^2+2)(x−2)^2(6−2x)> 0