James run the 400 meter for his school's track team . He beat his time by 2.7 seconds in the meet today with a time of 53.6 seconds . What equation represents this situation when x= his previous best time ? What was his previous best time ?

If a large cloud encounters a colder air mass, it tends to rise up in the sky. On the other hand, the cold air mass sinks toward the surface. This happens because temperature is a property that affects the density of substances. Colder substances are denser than warm substances.

Step-by-step explanation:

https://www.slader.com/discussion/question/what-might-happen-if-a-large-cloud-in-the-sky-suddenly-encountered-a-colder-air-mass-with-a-temperat/