I really need help with this.

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?

What is the sum of these mixed numbers 4 2/3+ 3 1/9

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?