Someone help please struggling on this answer thank you so much!

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?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Identify the number 127 as a rational or irrational. explain