9x_4(2x_3)=5(x+2) simplify ​

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?

Which expression is not a polynomial?

Tabby sells clothing at a retail store, and she earns a commission of 6.25% on all items she sells. last week she sold a pair of jeans for $32.50, a skirt for $18.95, and 2 blouses for $14.95 each. what was tabby's total commission? a $4.15 b $5.08 c $81.35 d $348.60