The security alarm on a parked car goes off and produces a frequency of 951 hz. the speed of sound is 343 m/s. as you drive toward this parked car, pass it, and drive away, you observe the frequency to change by 99 hz. at what speed are you driving?

A80-foot piece of siding is cut into three pieces so that the second piece is four times four times as long as the first piece and the third piece is five times as long as the first piece. if x represents the length of the first piece, find the lengths of all three pieces.

Omar is going on a road trip! the car rental company offers him two types of cars. each car has a fixed price, but he also needs to consider the cost of fuel. the first car costs $90 to rent, and because of its fuel consumption rate, there's an additional cost of s0.50 per kilometer driven.

Need on this geometry question. explain how you did it.