Expand the following:
a) 2(x+3)
b) 5(2x-4)
c) 4(2x+1)
d) 6(x-4y)

The dance committee of pine bluff middle school earns $72 from a bake sale and will earn $4 for each ticket they sell to the spring fling dance. the dance will cost $400 write an inequality to determine the number, t of tickets the committee could sell to have money left over after they pay for this year's dance. what is the solution set of the inequality?