The point slope from the equation below that represents the line that passes through the point (-1, 6) and has a slope of -3

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Which equation results from adding the equations in this system? x+6y=9 and -x+2y=-15

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?