Calculate the average of the numbers shown. 23.8, 12.1 ,-17.6, 31.3 A)12.4
B)12.8
C)13.4
D)13.8

Is this a polynomial function? i need to know asap

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

Find the value of x for which line a is parallel to line b