I need help on this question

What is the most accurate measurement of 1 pound

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?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)