How do i solve these? 1. -3(5y+9)=-36
2. 5b-8-10b=12
3. 3 over 4 (n+6)=12
4. 2(a-4)+3(a+4)=11

plz help

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

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?

Solve: 3x+y=6 4x-2y=18 show all work !