Name the property of equality that justifies going from 3x+6x to (3+6)x

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

Somone me i want to know what 18 hours out of 24 hours in a fraction

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares