8.
Factor t12-r3s15

Choose the right
1.(t4-rs5)(8t-rs5t4-r2s10)
2.(t4-rs5)(t8+rs5t4+r2s10)
3.(t9-rs12)(t18+rs12t9+r2s24)
4.(t4+rs5)(t8-rs5t4+r2s10)

Plz help

If f(x)= 3x+6 which of the following is the inverse of f(x)

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 do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?