3x = 42 solve for x show work plz

Josephine has a great garden with and area of 2x2 + x - 6 square feet

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?

If square root x = -7, then x= -49 true or false