Which two statements true ?

At which value in the domain does f(x) =0?

Write numerical coefficient of y² in the expression 2x² - 15xy – 7y²

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