An MP3 player holds up to 300 songs

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

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

How is this equation completed? i cannot find any examples in the book.