Combine like terms:
-5x-3x+7x
1)15x
2)-x
3)x
4)9x

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?

Identify this conic section. x2 - y2 = 16 o line circle ellipse parabola hyperbola

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.