Algebra- need all 3 answered. thanks

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?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Rewrite the following quadratic functions in intercept or factored form. show your work. f(x) = 3x^2 - 12