Cos(2α)*sin(α-β)-cos(β-α)*sin(2α)

Jamie went to home depot.she bought 25 bags of soil that cost $9 per bag.she bought 15 pots at $8 each, and she bought 23 bags of pebbles at $15 each.she used a coupon that gave her $5 off for every 100 dollars she spent. how much did jamie pay at the end?

Me asap! what is the slope of this line? enter your answer in the box.

The holiday party will cost $160 if 8 people attend.if there are 40 people who attend the party, how much will the holiday party cost