Share 350cm in the ratio 3 : 7

If f(x)= 3x+6 which of the following is the inverse of f(x)

Sorry guys but as you have a small brain

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?