Find the slope from the graph (help please)

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Solve 13 + w/7= -18 (w/7 is a fraction)

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?