find another real life situation that can be written as an inequality in one variable explain the situation, write the equation and then solve it

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

Jackie purchased 3 bottles of water and 2 cups of coffee for the family for $7.35. ryan bought 4 bottles of water and 1 cup of coffee for his family for 7.15. how much does each bottle of water cost? how much does each cup of coffee cost?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)