A surface amount of mass in a certain volume amount of matter an object contains.
I believe the second sentence is the answer since density is the measurement that compares the amount of matter that an object has to its volume.
27, you need to simplify both sides of the equation to get x on one side.
That is a horizontal straight line, so the slope is 0.
x = [-(-6) +/- sqrt((-6)^2 - 4*1 * 8))] / 2
= (6 + sqrt4) / 2 , ( 6 - sqrt4)/2
= 4 , 2
B is the independent variable, while y is the dependent variable.
