A total of n trucks and cars are parked in a lot. If the number of cars is 14 the number of trucks, and 23 of the trucks are pickups, how many pickups, in terms of n, are parked in the lot?

tube or goog will be great resources to find the answer to the question that you're asking

it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me