Used pie=3 calculate the area of a circle with a diameter of 14 cm

If 3x+8=3x+8 is it one solution or no solution

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?

How do i put 3(x+7) in distributive property