Expand (x-y)^4 “expand each binomial”

What are the first 4 terms in the multiplication pattern given by the formula 2×4n

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

12 out of 30 people chose their favourite colour as blue caculate the angle you would use for blue on a pie chart