QR is the midsection of triangle GHJ, what is the length of QR?

What situation is an example of an observational study

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?

What is the value of f(x) = 2.2 for f(-2)?