Can someone please sub to my channel? also 2x + 17 =21 is school related. what is x... My channel is at Komodo Gaming and the link is here:

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Ateam of runners is needed to run a 1 2 -mile relay race. if each runner must run 1 4 mile, how many runners will be needed?

The relative growth rate for a certain type of fungi is 60% per hour.a small culture has formed and in just 6 hours the count shows to be 20,273 fungi in the culture.what is the initial number of fungi in the culture?