Two men start from 2 places 600km apart and travel towards each other, the first travelling 5km/h faster than the other. they meet after 8 hours. what is the speed of the fastest man? i know that this relates to the following formula; speed = distance/time, but don't understand how to resolve correctly

Can someone me with this problem i don't understand i need

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth

The administrator of a large assisted living facility wanted to know the average age of the residents living at the facility. he randomly selected 12 residents and determined their age, listed here: 80, 65, 75, 83, 68, 73, 88, 79, 94, 72, 79, 68 what's the average age of the sample of residents? a. 79 years old b. 68 years old c. 75 years old d. 77 years old