Number 22 help thanks pls ASAP ASAP

The classrooms are trying to raise $1,200.00 for charity. mrs. leblanc's class has raised 50%. mr. patel's class has raised $235.14 ms. warner's class has raised 1/3 as much as mrs. leblanc's class. how much more money is needed to reach the goal of $1,200.00?

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

Solve 2x+y=3 x+y=5 in substitution method