Find the value of x.

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?

Ibeg you to me 20. a reaction produces 4.93 l of oxygen, but was supposed to produce 1 mol of oxygen. what is the percent yield?

Divide. –40 ÷ –5 a –8 b 200 c -200 d 8