Verify the identity. Sin 4x= 2 sin 2x cos 2x

Choose the triangle with x equal to 17.

Ican figure out 20 shares multiply by $117.98 =2359.6920 shares multiply by $124.32=2486.40then take 40 shares multiply by $128.48=5139.20after that i'm lost any be greatly appreciated.

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